Прибор. IASI-NG. [Редактировать]

16,920 каналов, диапазон 645-2760 cm-1 (3.62-15.50 µm) разделение на 4-е канала

Спектральный диапазон (µm) Спектральный диапазон (cm-1) Спектральное разрешение (unapodised) NEΔT
8.70 - 15.50 µm 645 - 1150 cm-1 0.125 cm-1 0.08-0.18 K @ 280 K
5.26 - 8.70 µm 1150 - 1900 cm-1 0.125 cm-1 0.03-0.38 K @ 280 K
4.35 - 5.26 µm 1900 - 2300 cm-1 0.125 cm-1 0.19-0.32 K @ 280 K
3.62 - 4.35 µm 2300 - 2760 cm-1 0.125 cm-1 0.17-1.10 K @ 280 K

Технические характеристики

#ХарактеристикаЗначение
1Масса, кг.360
2Мощность, Вт500
3Разрешение9 x 12-км IFOV в 75 x 75 км2 ячейке (кадры с расстоянием: 25 км)
4Тип приборарадиометер
5Целевое назначениеИзмерение температуры, влажности, частиц. Также позволяет оценивать содержание C2H2, C2H4, C2H6, CFC-11, CFC-12, CH3OH, CH4, CO, H2CO2, HCN, HNO2, HNO3, N2O, NH3, панхроматический, SO2)
6Тип сканераПоперечное: 20 шагов по 75 км, ряд 2130 км - Вдоль трэка: одна 75-км линия каждые 12 секунд
7Скорость работы, Мбит в секунду6

Найдено 462 документов по запросу «IASI-NG». [Перейти к поиску]


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0.1/5
.... CC Attribution 3.0 License. Towards IASI-New Generation (IASI-NG): impact of improved spectral... of a new instrument, the IASI-New Generation (IASI-NG), characterized by an improvement... also improved. We conclude that IASI-NG has the potential to strongly... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) chemistry and climate communities... IASI-New Generation (IASI-NG) mission. Its main objectives are: (i) continuity of the IASI... components. To fulfil these goals, IASI-NG will measure infrared radiation emitted... of IASI-NG field of view will be the same as for IASI... led to the definition of IASI-NG industrial specifications and focuses on... the expected performances of IASI-NG with regard to IASI. 2 2.1 Methodology to study... and radiometric scenarios Similarly to IASI, IASI-NG will be a Fourier Transform Spectrometer... from the Earth. IASI-NG will provide 16923 (8461 for IASI) spectral samples... IASI-New Generation (IASI-NG) 4369 1 Table 1. The six infrared sounder (IRS) scenarios. 0.9 IASI noise IASI noise/2 IASI noise/4 IASI (0.5 cm−1 ) IASI-NG (0.25 cm−1 ) IRS1a (IASI) IRS2a IRS1b... grey line), and the actual IASI-NG specifications (objective in blue and... 0.8 NedT at 280 K (K) Spectral resolution 0.7 IASI IASI/2 IASI/4 IASING Objective IASING Threshold 0.6 0.5 0.4 0.3 0.2 0.1 0 1000 1500 2000... the current IASI noise, the IASI noise divided by 2 and the IASI noise... be seen from Fig. 1, the IASI-NG objective and threshold radiometric noises... 4. The current noise specifications for IASI-NG are plotted in red (threshold... the spectral resolution of IASI (IRS1a,b,c scenarios) and IASI-NG (IRS2a,b,c scenarios) to... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) Figure 2. Sensitivities of infrared... spectral resolution of IRS1/IASI (a) and IRS2/IASI-NG (b) to various atmospheric and.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) The first term of.../2014/ 4371 tives of the IASI-NG mission. It is worth noting.... 3.1 3.1.1 Atmospheric temperature Sensitivity of IASI and IASI-NG channels to atmospheric temperature Various... opposed to IASI, it is possible to find IASI-NG channels for which.... 3c illustrating the capability of IASI-NG to resolve the most intense... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) Figure 3. As Fig. 2, for.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) 4373 Table 2. Number of... IASI spectral resolution in the 15 µm (a) and 4.3 µm (b) bands and at the IASI-NG... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) ence comes from the.... 3.2.1 Water vapour Sensitivity of IASI and IASI-NG channels to water vapour As... pressure levels for the IRS2-IASI-NG scenarios thanks to their higher... at the IASI spectral resolution (upper panel) and at the IASI-NG spectral.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) Table 3. Number of degrees.... The IASI-NG instrument, by extending the temporal coverage of the IASI mission... IASI-NG will present the same outstanding spectral and radiometric stability as IASI... Carbon dioxide Sensitivity of IASI and IASI-NG channels to CO2 CO2 has... (less than 0.1 K) for both IASI and IASI-NG, and the channels are sensitive... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) Table 4. Impact of spectral... of the companion instruments of IASI-NG onboard Metop-SG, its specifications.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) 4377 Table 5. Impact of... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) 0.05 295 IRS1a IRS1b... scenarios for IASI-NG (see Table 1) are used to simulate IASI-NG like spectra... 5.1.1 Carbon monoxide Sensitivity of IASI and IASI-NG channels to CO The absorption.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) 4379 Table 6. Improvement in... 2.3 respectively. 5.2 5.2.1 Ozone Sensitivity of IASI and IASI-NG channels to ozone In the... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) Table 8. Improvement in terms.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) Sulfur dioxide (SO2 ) SO2... gain of sensitivity of IASI-NG in comparison to IASI for boundary layer... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) NH3 10 9 8 IRS1b IRS1c... on the thermal infrared sounder IASI-NG, currently designed by CNES, that... the noise reduction envisaged for IASI-NG is important as channels in... to IASI has not been studied here, following the specifications of IASI-NG.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) al., 2012), will be... 2034), the IASI-NG mission will extend the 15-years IASI series by... accurate atmospheric and surface variables. IASI-NG will thus strongly benefit the... particularly wish to thank the IASI-NG Project Team at CNES and... C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) De Wachter, E., Barret, B., Le.../ C. Crevoisier et al.: Towards IASI-New Generation (IASI-NG) eral component infrared extinction... of semitransparent cirrus from AIRS & IASI, Third IASI International Conference, Hyères...



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0.08/5
3rd IASI Conference Hyères, 4-8 February 2013 The IASI-NG mission: Scientific objectives... Piérangelo, Claudia Stubenrauch The IASI-NG mission Carbon monoxide Numerical Weather... GSICS. Lessons learned with IASI onboard MetOp-A: •IASI benefits three communities that.../sea by day/night. The IASI-NG mission Carbon monoxide Missions under...-1 CrIS MetOp-C IASI-1, -2, -3 Flex CarbonSat JPSS-2 CrIS MetOp-SG IASI-NG •EPS-SG •PFA : MetIMAGE, MWS, IASI-NG, RO, UVNS, 3MI •PFB : SCATT, MWI, RO •IASI-NG Status: •Phase... Thales Alenia Space-France). The IASI-NG mission Carbon monoxide •Objectives of...: •To assure the continuity of IASI for NWP, atmospheric chemistry and... cm-1 for IASI) -spectral sampling: 0.125 cm−1 (0.25 cm-1 for IASI). -reduction... a factor of ~2 as compared to IASI. -spatial sampling: 12 km FOV... the objectives? IASI-NG: a few scenarios Carbon monoxide 0.5 cm-1 0.25 cm-1 IASI-NG: a few scenarios Carbon monoxide IASI-NG For a 10ppbv CO perturbation: CO ~0.8 K 0.25 cm-1 Noise: ~0.1 K IASI 0.5 cm... (1 K) IASI-NG: a few scenarios Specifications from CNES 2012 ITT Carbon monoxide IASI-NG: impact... of each scenario compared to IASI Relative gain of each scenario.... IRS1 ter IASI IASI IRS 2 IASI/2 IASI IRS2 durci IASI/( 2√2) IASI IASI/2 IASI/2 Noise Spec. res. IASI/2 IASI IASI/4 IASI IASI IASI/2 IASI/2 IASI/2 IASI/4 IASI/2 600 700 800 900 1000 0.00 IASI contribution IASI-NG... increasing the number of channels. IASI-NG: impact on atmospheric composition Carbon... 26th 2009 IASI IASI-NG 1.0 IASI 10 IASI-NG Aircraft 0.2 Altitude of max. sensitivity (km) IASI IASI-NG 6 0 2 MOZAIC... in Europe (August 20th, 2009). IASI-NG: impact on climate variables Carbon... of the CO2 precision 15 µm 4.3 µm IASI/2 •IASI-NG will enable the use of... MWS! 15 µm 4.3 µm IASI-NG both 0% 45 % CO2 weighting function IASI 30 % 15 + 4.3 µm •N2O? 10 Pressure (hPa) Spectral bands for IASI-NG 100 1000 IASI-NG: impact on detection of..., H2S, H2SO4, ash) IASI-NG: summary Carbon monoxide IASI IASI-NG Chemistry DOFs O3 3-4 CO... Error (%) DOFs Error (%) What the ‘NG’ brings H2O 5-6 ~13% 6-7 ~10% Error... : 8% PBL : 10% Tropo : 6% 2 What the ‘NG’ brings More information in PBL... interferences More types 0,04 @4µm 0,02 @4µm IASI-NG: next steps Carbon monoxide So...). Objectives: evaluate the impact of IASI-NG (with the latest specification) in..., aerosols, trace gases, etc.) The IASI-NG science plan The work done... for the approval of the IASI-NG mission by CNES board. This... et al., TBS AMT): Towards IASI-New Generation: impact of improved... on IASI-NG (similarly to what was done for IASI). First task: writing a IASI-NG... for the ISSWG 1998 The IASI-NG science plan Numerical Weather Prediction... ! (bias correction, variational techniques, etc.) • IASI LW T and WV assimilated in... synergy with other instruments) The IASI-NG science plan Atmospheric composition •What...) Longrange pollution Aviation threat The IASI-NG science plan Atmospheric composition •What... still needed • • • • Coupled retrieval of IASI and GOME-2 to improve vertical... polluted profiles The IASI-NG science plan Climate With IASI: 5 years of observation... and study of climate. With IASI-NG: - Opportunity to expend the coverage... calibration. The IASI-NG science plan Climate IASI 1998 Priorities for IASI research and... characteristics. The IASI-NG science plan Climate IASI 1998 Priorities for IASI research and.... IASI AOD (10µm) + altitude + radius IASI-NG surroundings • GMES: NWP + atmospheric composition + climate IASI-NG.... The promotion and exploitation of IASI-NG will have to be performed... ATBD are needed. •Coupling of IASI-NG with companion instruments: both in... coupling atmospheric/climate models and IASI characteristics: clouds, radiative budget, potentially... contamination  SW. IASI-NG improved contributions to… Atmospheric profiling IASI-NG Improvement on pollution... possible + SO2 and ash tracking IASI-NG has the potential for strongly...



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0.14/5
..., 16-20 September 2013 The  IASI-­‐NG  mission  onboard  MetOp-­‐SG:   Scien....crevoisier@lmd.polytechnique.fr The  IASI  instrument   • IASI (Infrared Atmospheric Sounding Interferometer... CNES, in collaboration with EUMETSAT. • IASI provides -8461 spectral channels between... 2018 2020-2022 +7? +7? IASI-A IASI-B IASI-C IASI-NG-1 IASI-NG-2 IASI-NG-3 • MetOp-­‐SG   • PFA  :  MetIMAGE,  MWS,  IASI-­‐NG,  RO,  UVNS/SenKnel  5,  3MI.   • PFB  :  MWI,  ICI,  SCA,  RO,  Argos-­‐4.   • IASI-­‐NG  Status:  Phase-­‐B  since  compleKon  of  industrial  compeKKon.   Lessons  learned  with  IASI   Carbon  monoxide   • IASI  addresses  the  needs  of...  stabiliKes    are  very  important.   The  IASI-­‐NG  mission   Carbon  monoxide   • Objec:ves...:   • To   assure   the   conKnuity   of   IASI   for   NWP,   atmospheric   chemistry   and....   • IASI-­‐NG  Characteris:cs:   -­‐ spectral  coverage:  645  -­‐  2760  cm−1  (similar  to  IASI).       -­‐ spectral...−1  ager  apodisaKon  (0.50  cm-­‐1  for  IASI)   -­‐spectral  sampling:  0.125  cm−1  (0.25  cm-­‐1  for  IASI).   -­‐reducKon   of   the   radiometric   noise...   a   factor   of   ~2   as   compared  to  IASI.   -­‐spaKal  sampling:  12km  FOV.   How...?   IASI-­‐NG:  a  few  scenarios   Carbon  monoxide   Spectral  resolu:on   IASI  noise   IASI  noise  /2   IASI  noise  /4   0.5  cm-­‐1   IRS1a=IASI   IRS1b   IRS1c...  CNES  2012  ITT   IASI-­‐NG:  a  few  scenarios   Carbon  monoxide   IASI  and  IASI-­‐NG  spectrum     Averaged...-­‐1   0.25  cm-­‐1   IASI-­‐NG:  a  few  scenarios   Carbon  monoxide   IASI  and  IASI-­‐NG  spectrum     Averaged  over...   For  a  10ppbv  CO   perturba0on:   IASI   0.5  cm-­‐1   IASI-­‐NG   0.25  cm-­‐1   CO  ~0.4K   Noise...  (2%)   CO  (10%)   CH4  (10%)   Tsurf  (1  K)   IASI-­‐NG:  impact  on  thermodynamic  variables   Carbon... in error (%) IRS1a IRS1b 0.5 IRS1c IASI-NG resolution IASI resolution 0 0.1 0.2 0.3 0.4 Relative gain in...  increasing  the  number  of  channels.   IASI-­‐NG:  impact  on  atmospheric  composi:on...  26th  2009   DOFS   IASI   AlKtude  (km)   Carbon  monoxide   IASI-­‐NG   IASI/IRS1a   IASI-­‐NG/IRS2b   Aircra`   1.0   0.2   AlKtude  of  max.  sensiKvity  (km)   IASI   IASI-­‐NG   6   2   MOZAIC...).   Sellito  et  al.,  AMT,  2013   IASI-­‐NG:  impact  on  climate  variables   Carbon...  precision   10 30  %   IASI/2   15  µm   4.3  µm   IASI-­‐NG   both   0  %   45  %   • IASI-­‐NG   will   enable   the   use...  funcKon   IASI   Pressure (hPa) Spectral  bands   for  IASI-­‐NG   100 1000 IASI-­‐NG:  impact  on...,  H2S,  H2SO4,  ash)     IASI-­‐NG:  summary   Carbon  monoxide   IASI   IASI-­‐NG   Chemistry   DOFs   O3   3-­‐4   CO...   Error  (%)   DOFs   Error  (%)   What  the  ‘NG’  brings   H2O   5-­‐6   ~13%   6-­‐7   ~10%   Error...  :  8%   PBL  :  10%   Tropo  :  6%   2   What  the  ‘NG’  brings   More  informaKon  in  PBL...  interferences   -­‐   More  types   0,04  @4µm   0,02  @4µm   IASI-­‐NG:  next  steps   Carbon  monoxide   So...:ves:   evaluate   the   impact   of   IASI-­‐NG   (with   the   latest   specificaKon...  situaKons.   Undertaken  by  the  ISSWG  (IASI  Sounding  Science  Working  Group).   First...  will  be  needed.   • Coupling  of  IASI-­‐NG  with  companion  instruments  (MW/IR...   coupling   atmospheric/climate   models   and   IASI-­‐NG   characterisKcs:  clouds,  radiaKve  budget,  potenKally...  to  be  able  to  interpret   IASI-­‐NG  observaKons.   -­‐  RT  modeling:       -­‐line-­‐mixing...  µm  and  SW.     -­‐solar  contaminaKon    SW.   IASI-NG improved contributions to… Pollu:on...  and  NH3)   Atmospheric   profiling   IASI-NG! Befer  tracking   of  long  range...  tracking   IASI-­‐NG   has   the   poten:al   for   strongly   benefi:ng   the   NWP...



Дата загрузки: 2017-03-10
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0.21/5
... expected to be resolved by IASI/2, while IASI Geoscientific has a vertical resolution... to as IASI/2, is one possible configuration of the IASI-NG (New Generation) instrument (the configuration called IASI-NG/IRS2) currently... average, lower than 10 % for IASI/2. IASI/2 is expected to have a significantly....: LT ozone from IASI-NG Infrared Atmospheric Sounding Interferometer (IASI), have been shown... of the existing projects is IASI-NG (Infrared Atmospheric Sounding Interferometer-New...., 2012; Clerbaux and Crevoisier, 2013). IASI-NG is expected to be launched... the detection of new species. IASI-NG has recently accomplished the phase... of IASI. During this design activity, different possible configurations of IASI-NG have... the following lines is called IASI-NG/IRS2 by Crevoisier et al... to as IASI/2. The IASI/2 concept has a similar horizontal resolution as IASI, with... et al.: LT ozone from IASI-NG in terms of both local... vertical resolution characterization of the IASI and IASI/2 pseudo-observations is given... Sect. 5 we give conclusions. 2 2.1 IASI and IASI/2 pseudo-observations 623 present work... the same observation geometry for IASI/2. IASI overpasses Europe twice a day, at... et al.: LT ozone from IASI-NG constraint matrix is a combination of... pseudo-observations Error estimation for IASI and IASI/2 tropospheric ozone retrievals In... the error budget estimated for IASI and IASI/2 pseudo-observations. According to... the two instruments, 3–7 % for IASI/2 and 6–9 % for IASI in the interval 2–6 km..., smoothing and total errors of IASI/2 and IASI. The improvement is particularly... et al.: LT ozone from IASI-NG 625 Fig. 1. Mean values for... IASI/2 (solid lines): (a) absolute errors, (b) percent errors, (c) percent improvement of IASI/2 over IASI... small difference between our IASI pseudoobservations and IASI real measurements error analysis... et al.: LT ozone from IASI-NG Fig. 4. Histogram of the DOF... particular 0.63 and 0.48 for IASI/2 and IASI, respectively. The maximum sensitivity... et al.: LT ozone from IASI-NG 627 Fig. 5. Mean ozone profiles... ozone distributions retrieved by IASI and IASI/2 Global analysis In the present... a general statistical analysis of IASI and IASI/2 tropospheric ozone profile and surface... troposphere from pseudo-reality, and IASI and IASI/2 pseudo-observations for AM.... It is clear that both IASI and IASI/2 pseudoobservations underestimate the pseudo... (Pearson) coefficient profiles for IASI and IASI/2, with respect to pseudo-reality... (where the information provided by IASI and IASI/2 spectra contribute the most... the more significant differences between IASI and IASI/2. The vertical profile has... also compared IASI and IASI/2 surface–6 km TOC pseudo-observations. IASI has RMSE... et al.: LT ozone from IASI-NG 4.2 Tropospheric ozone distribution at regional... analyses of the performances of IASI and IASI/2 to describe tropospheric ozone...-reality, and IASI and IASI/2 pseudo-observations. The differences of IASI and IASI/2 pseudo.... These results show that both IASI and IASI/2 underestimate the pseudo-reality... (0.1 and 0.2 DU overestimation for IASI and IASI/2, respectively), showing the coherence of... et al.: LT ozone from IASI-NG 629 Table 1. Mean biases, RMSEs... 0–6 km 0–12 km 7–12 km IASI IASI/2 IASI IASI/2 IASI IASI/2 IASI IASI/2 AM Bias [ppb] RMSE [ppb...-land South-sea RMSE [DU(%)] IASI IASI/2 IASI IASI/2 −0.99 (−4.66 %) +0.31 (+2.38 %) +0.28... (top), IASI and IASI/2 pseudoobservations (middle), differences (bottom) of IASI and IASI/2 pseudo-observations... et al.: LT ozone from IASI-NG Fig. 8. Surface–6 km TOC for... AM, MOCAGE pseudo-reality (column 1), IASI and IASI/2 pseudo-observations (columns 2 and... of MOCAGE pseudo-reality, and IASI and IASI/2 pseudo-observations over Amsterdam... et al.: LT ozone from IASI-NG 631 Fig. 10. Time series... pseudo-reality (green), and IASI (black) and IASI/2 pseudo-observations (red) over.... There, both IASI and IASI/2 work pretty well, while IASI/2 still captures better... Fig. 11, MOCAGE pseudo-reality, IASI and IASI/2 pseudo-observations and a priori..., MOCAGE pseudo-reality, and IASI and IASI/2 pseudoobservations over Berlin for the... pseudo-reality (green), and IASI (black) and IASI/2 pseudo-observations (red) over... from IASI-NG Fig. 12. MOCAGE pseudo-reality (green), IASI (black) and IASI/2 pseudo... pseudo-reality (green), and IASI (black) and IASI/2 pseudo-observations (red) over... et al.: LT ozone from IASI-NG linked to a very localized pollution... a possible configuration of IASI-NG (IASI-NG/IRS2, here called IASI/2) TIR nadir satellite instrument... to the evaluation of the IASI-NG mission. Our results are of... overpasses, of IASI and IASI/2 pseudo-observations. We found that IASI/2 brings a specific....5 %), for IASI, to 2.0–1.8 DU (10.7–9.7 %), for IASI/2. According to our analysis, IASI/2 is...´e de l’AIR) and CNES/TOSCA/IASI-NG projects. We wish to thank...: IASI-NG: coordination des activit´es de pr´eparation de la mission IASI... et al.: LT ozone from IASI-NG distributions over Europe during the... et al.: LT ozone from IASI-NG son, D., ten Brink, H., Theloke, J., van...



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... Toulouse, 21-27 March 2012 IASI-New Generation onboard EPS-SG...érangelo, Didier Renaut, Claudia Stubenrauch IASI oboard MetOp-A Numerical Weather Prediction... GSICS. Lessons learned with IASI onboard MetOp-A: •IASI benefits three communities that... by day/night. What’s next? IASI-NG as part of Eumetsat EPS... Merlin Microcarb METOP MetOp-SG IASI-NG Sentinel 5 IASI on MetOp-A, B (2012) and C (2017) •EPS-SG •PFA : MetIMAGE, MWS, IASI-NG...-France and Thales Alenia Space). IASI-New Generation •Objectives of the...: •To assure the continuity of IASI for NWP, atmospheric chemistry and... (0.50 cm-1 for IASI) Radiometric performances (Level1c) IASI-NG spec. Industrial perf. Radiometric... (NWP) Threshold (AtmC) Breakthrough (AtmC) IASI-NG Prime A Performances Prime B Performances 0,75...: 0.125 cm−1 (0.25 cm-1 for IASI). 0,55 0,45 0.4 0,4 0,35 -reduction of... a factor of ~2 as compared to IASI. 0,3 0,25 0.2 0,2 0,15 0,1 -spatial sampling: 12km... radiometric noise 2800 IASI-NG - Sensitivity analysis – Full spectrum IASI-NG T (1K) H2O (20...%) CH4 (10%) Tsurf (1 K) IASI-NG - Sensitivity analysis – Full spectrum IASI T (1K) H2O (20...%) CH4 (10%) Tsurf (1 K) IASI-NG - Sensitivity analysis – Full spectrum IASI T (1K) H2O (20...%) CH4 (10%) Tsurf (1 K) IASI-NG - Sensitivity analysis – Full spectrum IASI-NG For a 10ppbv CO perturbation: CO ~0.8K Noise: ~0.1K IASI CO...%) CH4 (10%) Tsurf (1 K) IASI-NG - Sensitivity analysis – Full spectrum IASI-NG O3 T CO2 CO... of IASI-NG on Temperature profile sounding T profile error P (hPa) IASI IRS 1 IASI-NG IRS... contribution of IASI-NG is about twice the contribution of IASI. 0 1 10 2 10... 0.2 0.3 0.6 0.8 1.0 1.2 1.4 0.5 0.6 0.7 1.8 IASI IRS 1 IASI-NG IRS 2 a priori a priori DOFS = 5.9 DOFS = 10.7 0.4 1.6 0.8 0.9 1.0 Impact of IASI-NG on... cm-1 P (hPa) 0 Noise Spectral resolution IASI IASI IASI/2 IASI IASI/(2√2 ) IASI IASI/2 IASI/2 IRS 1 100 IRS1 bis IRS1... as: (a posteriori-a priori)/(a priori) IASI contribution IASI-NG contribution • It is in the... on the one developed for IASI (Eremenko et al., GRL, 2008... averaging kernels For ozone [0-6 km]: IASI-NG will bring 50% more info..., 2009. Total column error DOFS IASI-NG NeDT 0.85 K NeDT 0.15 K NeDT...-IRS 10% IASI IASI MTG-IRS Improved vertical resolution IASI-NG Improved accuracy Retrieval... various configurations compared to the IASI current precision (which uses the... precision 15 µm 4.3 µm IASI-NG both 30 % IASI/2 0% 45 % CO2 weighting function IASI Pressure (hPa) Spectral bands for IASI-NG 10 100 •IASI-NG will...: SO2, H2S, H2SO4, ash) Summary IASI IASI-NG Chemistry DOFs O3 3-4 CO 1-2 HNO3... Error (%) DOFs Error (%) What the ‘NG’ brings H2O 5-6 ~13% 6-7 ~10% Error... : 8% PBL : 10% Tropo : 6% 2 What the ‘NG’ brings More information in PBL... resolution and radiometric noise of IASI-NG will enable: (1) a better coverage of... chemical species only detected by IASI).  The reduction of the noise... depend on: (1) the synergy between IASI-NG and EPS-SG/MWS, EPS... generation instruments. IASI-NG improved contributions to… Atmospheric profiling IASI-NG Improvement on pollution... possible + SO2 and ash tracking IASI-NG has the potential for strongly... quality observations delivery. Generation::improved IASI-New Generation supports volcaneous alerts...



Дата загрузки: 2017-10-24
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0.19/5
... 7 - 10 October 2014 Overview of IASI-NG the new generation of infrared... Atmospheric Sounding Interferometer New Generation (IASI-NG) is a key payload element of..., atmospheric chemistry, and climate monitoring. IASI-NG is designed with a very high... by two compared with the IASI first generation ones. The measurement... community. Thus was born the IASI mission which has been designed... accuracy. The role of the IASI instrument is to monitor the... satellite (METOP), IASI has an integrated infrared imager. The IASI-NG mission [6] aims to provide continuity of the IASI service but... performances improvement with respect to IASI’s ones. The Table 1 gives the... by a factor two compared with IASI. First idea to fulfill the requirements is, compared to IASI, to increase the interferometer Optical... on ground spatial sampling as IASI. However, it is well known... Table 1. IASI-NG main requirements Requirement Value sounding point size IASI like (≈12km) spatial sampling IASI like (≈25km) geolocation error IASI/2 (0,5 km) radiometric calibration error IASI/2 NedT@280K IASI/2 radiometric error IASI/2 (≈0,25K @ 280K) continuous spectral covering IASI like spectral resolution IASI/2 spectral sampling IASI/2 spectral calibration error IASI/2 ICSO... due to the FOV. The IASI-NG instrument is based on a classical... the pointing mirror. 1011 .. Fig. 1. IASI-NG functional scheme ICSO 2014 International... four IASI-NG spectral bands. Table 2 give the band separation. Compared to IASI... the sequencing of the activities. IASI-NG needs also to geolocate sounding...-SG [7]) and co-registration with IASI-NG sounding pixels. The co-registation... development plan. IASI-NG detection chain may seem comparable to IASI’s one but... ES) IV. INSTRUMENT BUDGETS The IASI-NG instrument will be composed of... includes opto-mechanical parts of IASI-NG instrument, for the sounder and... – (b) I-EM V. CONCLUSIONS Phase B of the IASI-NG Instrument is now running and... radiometric and spectral improvements that IASI-NG have to reach to fulfill... website http://smsc.cnes.fr/IASI-NG/index.htm REFERENCES [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] http.../atmosphere.htm G. Chalon, F. Cayla, D. Diebel, “IASI : An Advanced Sounder for Operational.... L. Buffet, E. Pequignot, D. Blumstein and al, “IASI instrument onboard Metop-A : Lessons learned..., “The IASI-NG mission: Scientific objectives and expected results,” 3rd IASI Conference Hy... generation Infrared Atmospheric Sounder Interferometer (IASI-NG),” SPIE 8841-22, Current Developments...



Дата загрузки: 2017-11-24
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0.22/5
Evaluation of IASI-NG impact on NWP and atmospheric chemistry compared to IASI Javier ANDREY-ANDRES, Vincent GUIDARD, Nadia FOURRIE, Myriam PEYRE (myriam.peyre@meteo.fr) CNRM-GAME, Météo France and CNRS, 42 av Coriolis 31057 Toulouse, France I. Introduction The hyperspectral infrared sounder IASI has already demonstrated its high capabilities for Numerical Weather Prediction (NWP), atmospheric composition and climate studies. As the second generation of the European Polar System (ESP-SG) is being prepared, a new generation of IASI has been designed and will be on board EPS-SG: IASI-NG (Crevoisier et al., 2014). IASI-NG will benefits from an increased design compared to IASI: double spectral resolution and radiometric noise decreased by a factor 2. In order to get ready to use this new instrument and to evaluate its impact on various applications, a series of simulated data has been built up. Additionally, 1D-Var assimilation experiments have been carried out to evaluate the impact of IASI-NG with respect to IASI. II. Observing System Simulation Experiment (OSSE) construction Four dates in the middle of each season from 2013 have been selected : February 4 th, May 6th, August 6th and November 4th. The full IASI orbit for each one of these data has been computed for a total of 5.242.448 simulations for each instrument (IASI scan is used for IASI-NG). The experiment has been carried out into three steps : (1) Construction of the input data base containing all the required information ; (2) Simulations of spectra for both IASI and IASI-NG ; (3) Spectra perturbation by adding the instrument noise multiplied by a random Gaussian noise. Météo France Preprocessing : - IASI position - Instrument and solar angles (1) Construction of the input database (2) Model simulations 4A and RTTOV (3) Spectra perturbation Instrument characteristics IASI / IASI-NG [Instrument noise] x [Random Gaussian noise] MACC data (from ECMWF) : - Vertical profiles of T, q, O3, CO, SO2 - Surface P and T LMDz Model : - Profiles of CO2 and CH4 OSSE database Wisconsin university : - Atlas of emissivity Figure 1 : OSSE construction III. Case study To compare the impact of IASI-NG new characteristics in retrievals of temperature profiles, both perturbed spectra and input data are introduced into the 1D-Var NPWSAF software. 102 channels from MétéoFrance operational channel selection have been used to retrieve temperature profiles. Among all available data, only clear-sky data over sea, over the AROME-France domain have been considered. AROME is the operational convectivescale model of Météo-France. 6486 observations have been selected. Figure 2 : Selected observations IV. Results The relative gain in error is defined as the difference between the a priori and a posteriori error, divided by the a priori error. IASI-NG news characteristics bring an improvement in error reduction compared to IASI. Gain in error is doubled in the upper troposphere. Yet the gain is limited in lower layers and does not exceed a factor 1,5, This is probably be due to a limited unoptimized channel selection for the retrieval. Improvements will be brought with a dedicated channel selection for IASI-NG. Observation error diagnostic (Desroziers, 2005) for IASI-NG is reduced by a factor 2 compared to IASI, as noise reduction between the two instruments. V. Conclusion and future works - An OSSE experiment has been conducted to assess the impact of IASI-NG, in comparison with IASI one, on NWP models, atmospheric composition and climate studies. - IASI and IASI-NG spectra have been simulated for four dates in the middle of each season. - Retrievals using 102 channels from Météo-France operational channel selection have been carried out, stating the intake of IASI-NG regarding IASI. - In the future, channel selection methods will be applied to IASI-NG on the whole dataset in order to prepare its utilisation in global & mesoscale NWP models. Figure 4 : A posteriori observation error correlation matrices Figure 3 : Relative gain in error for retrievals of temperature profiles for IASI and IASI-NG and corresponding observation error diagnostic. Error variances are lower for IASI-NG than for IASI, but covariances are of the same amplitude, explaining an increased correlation between its channels. These correlations may be due to errors in the radiative transfer or in the spectroscopy. Consequently, a full R matrix must be taken into account for assimilation in NWP models. References Acknowledgments C. Crevoisier et al. (2014) : Towards IASI-New Generation (IASI-NG) : impact of improved spectral resolution and radiometric noise on the retrieval of thermodynamic, chemistry and climate variables. Atmos. Meas. Tech. Vol 7, pp. 4367-4385. The authors benefited from de RTTOV model and 1D-Var software developed in the framework of the NWP-SAF of EUMETSAT and thank Pascal Brunel for his help. They are also grateful to LMD and Bernard Tournier.



Дата загрузки: 2017-02-18
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0.07/5
...’s carbon budget? IASI-NG : un nouvel instrument pour les satellites météo ?/IASI-NG: newgeneration instrument...é de l’océan, ou encore IASI, pour l’étude de l’atmosphère... la composition de l’atmosphère, IASI-NG, la nouvelle génération de sondeur... moisture and ocean salinity, and IASI to sound the atmosphere. To... new-generation atmospheric sounding instrument IASI-NG will be flown on Europe... COP21. 38 CONNAÎTRE KNOWING IASI-NG Un nouvel instrument pour les...-2040, embarqueront chacun un instrument IASI-NG de nouvelle génération. Tous identiques... résultats du spectromètre infrarouge IASI (interféromètre atmosphérique... poursuivre le programme avec l’instrument IASI-NG. Ce nouvel instrument gagnera en... l’intégralité du système IASI-NG, composé de l’instrument et de... traitement des données de IASI-NG dans ses systèmes sol... 2021-2040 will fly the IASI-NG new-generation infrared atmospheric sounding... FORECASTS The results of the IASI instrument aboard MetOp-A and MetOp... to pursue the programme with IASI-NG. This new instrument will be... and will develop the whole IASI-NG system, composed of the instrument.... It will also integrate the IASI-NG data processing line in its... des programmes Otos et THR-NG CNES project head for the OTOS and THR-NG programmes later developments. France’s defence... post-CSO. Le satellite THR-NG emportera ces innovations technologiques qui... control moment gyroscope. The THR-NG satellite will fly these technology...ème très haute résolution THR-NG. Artist's view of the OTOS... pave the way for THR-NG, a next-generation veryhigh-resolution observation... d’observation optique. Le programme THR-NG (Très Haute Résolution de Nouvelle... optical observation satellites. The THR-NG next-generation very-high-resolution... a décidé d’engager le programme Comsat-NG. Les deux satellites du programme... résister à de forts brouillages, Comsat-NG devrait fournir de nouvelles capacit... the go-ahead for COMSAT-NG. The two satellites developed under... du système spatial Comsat-NG. Par ailleurs, il est en... les innovations duales. conditions, COMSAT-NG will offer new military Ka... technical responsibility for the COMSAT-NG space system. It is also...



Дата загрузки: 2017-03-26
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0.06/5
... the missions MetOp-A and -B (GOME2/IASI) provide continued nadir-viewing ozone... data from other instruments (e.g., OMI, IASI) • Including new products (e.g., tropospheric data...), equipped with the GOME-2 and IASI instruments. (ii) Three Chinese CMA... IR instruments like GOME-2 and IASI measure a list of ozonerelated trace...-A (GOME-2 and IASI, since 2006); and MetOp-B (GOME-2 and IASI, since 2012.... 2014). • Infrared Atmospheric Sounding Interferometer (IASI), on board of EUMETSAT MetOp... is developing a methane product from IASI. 1.1.3 • Université Libre de Bruxelles (ULB... is heavily involved in the IASI/MetOp satellite mission, being member... auspice of CNES and EUMETSAT. IASI is a sounder that measures the...-1) resolutions (Clerbaux et al 2009). IASI is part of the EPS... 2020 at least. The first IASI instrument onboard the European MetOp... infrared sounders (IMG and TES), IASI has the advantage of high...-real time processing chain for IASI. Of particular relevance here are... the operational processing chain for IASI O3. FORLI-O3 will also... validation. • Infrared Atmospheric Sounding Interferometer (IASI) operating on board of MetOp... chemistry-related activities around the IASI/MetOp satellite mission. The researchers take active part in the IASI Sounder Science Working Group (ISSWG... on total columns (see above), IASI has also profiling capabilities at... decorrelated. The maximum sensitivity of IASI to the ozone profile extends... best cases. In addition to IASI, the ULB researchers are involved... to their large involvement in IASI. They have contributed to several... of global ozone distributions using IASI, both in terms of columns... obtained and the ability of IASI to capture the vertical structure.... • Development of retrieval algorithms for IASI/MetOp for aerosols and CH4... Sentinel-4 and Sentinel-5 (UVN and IASI-NG instruments) and their precursor Sentinel... most studies prior to IASI launch, and for IASI local analyses. A module... series of software specific to IASI (Hurtmans et al., 2012). These... become the operational processor for IASI after their implementation at EUMETSAT... O3MSAFCDOP2 • Radiance indexing schemes for IASI, which are used to track..., upgrade and maintenance of a NRT IASI processing chain. Processing starts with... to the validation activities of IASI and ACE-FTS chemistry products... to the validation activities of IASI chemistry products, in particular CO... oscillation (QBO) proxies to the IASI time series (Wespes et al... six full years of the IASI observation in four selected layers... series for CO columns from IASI and contribution to a decadal record... (ULB) Dissemination in scientific literature IASI CO distributions of profiles are.... Future operational dissemination of the IASI CO, O3, HNO3 and SO2 products from IASI will occur within the O3SAF... Hurtmans, P-F Coheur, C Clerbaux, Validation of IASI ozone profiles, using balloon sounding... field comparisons between GNSS tomography, IASI satellite observations and ALARO model... ozone data from GOME-2 and IASI using reference ground-based measurements... the infrared atmospheric sounding interferometer (IASI). Atmospheric Measurement Techniques, 5, 581-594..., P., & Cammas, J. (2012). Retrieval of MetOp-A/IASI CO profiles and validation with... the Infrared Atmospheric Sounding Interferometer (IASI). Atmospheric Measurement Techniques, 6(4), 917-925... scientific ozone products retrieved from IASI spectra using ozonesondes. Atmospheric Measurement... of polar ozone profiles by IASI/MetOp sounder with 2010 Concordiasi..., D. (2012). Hyperspectral earth observation from IASI. Bulletin of the American Meteorological... transfer and retrieval code for IASI. Journal of quantitative spectroscopy & radiative... Mazière, M. (2012). Validation of IASI FORLI carbon monoxide retrievals using..., H., Szopa, S., & Turquety, S. (2012). Assimilation of IASI satellite CO fields into a global..., T., Schlager, H., & Weinheimer, A. (2012). Analysis of IASI tropospheric O3 data over the... the first time from the IASI/MetOp thermal infrared sounder. Atmospheric... rural regions as seen by IASI and GOME-2. Journal of geophysical... ozone hole as observed by IASI/MetOp for 2008-2010. Atmospheric... climate related studies using the IASI remote sensor’ for preparing the scientific research aspects of the IASI mission on board METOP-A’ • Involved... (A3C, 2011-2013); ACROSAT, B-O3MSAF, IASI-Flow, TRACE-S5P (2014-2015..., 2012-2013 • IASI.Flow: Infrared Atmospheric Sounding with IASI and Follow-on... of the “IASI Conference” series • Member of the IASI Sounder Science Working...) On the remote sensing side, IASI-related activities will be strengthened... group will foster activities with IASI in the context of chemistry... of a N2O data product from IASI. • In anticipation of the upcoming... EPS/Metop Sodankylä campaign to IASI measurements, Atmospheric Measurement Techniques, 4(6), 1177... ozone data from GOME-2 and IASI using reference ground-based measurements... use similar algorithms with the IASI on MetOp-A and the CrIS... Halocarbons in Air Comparison Experiment IASI Infrared Advanced Sounding Interferometer JPL...



Дата загрузки: 2017-04-08
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0.04/5
... the Earth’s major land DORIS-NG, SIRAL, Laser Reflectors Type: Inclined... the Sentinel-5 mission. 3 satellites. METimage, IASI-NG, 3MI, RO, MWS Planned 2022... field, wave and topography. DORIS-NG, RAD, SCAT, ALT Planned 2016.... SEM (POES), ARGOS-3, S&R (NOAA), MHS, IASI, GRAS, GOME2, ASCAT, AMSU-A, AVHRR.... SEM (POES), ARGOS-3, S&R (NOAA), MHS, IASI, GRAS, GOME2, ASCAT, AMSU-A, AVHRR..., climatology. SEM (POES), ARGOS-3, MHS, IASI, GRAS, GOME-2, ASCAT, AMSU-A, AVHRR.../projects/oersted/ LRA, JMR, DORIS-NG, POSEIDON- Type: Inclined, non-sun... reference, high-precision ocean DORIS-NG, AMR-C, GNSS POD Type: Inclined... reference, high-precision ocean DORIS-NG, AMR-C, GNSS POD Type: Inclined..., digital terrain models, environmental monitoring. NG (SPOT) Altitude: 832 km Period... with width > 100 m LRA, DORIS-NG, AMR, GPSP, Kaband Radar INterferometer... Sensor Mission NOAA / NASA TSX-NG Planned 2018 2025 Commercial follow... terrain models, environmental monitoring. TSX-NG X-Band SAR Currently being flown... Instrument (DDMI) NASA (NOAA) DORIS-NG Doppler Orbitography and Radiopositioning Integrated by Satellite-NG CNES DORIS-NG (SPOT) Constellation of bistatic... and Radiopositioning Integrated by Satellite-NG (on SPOT) CNES DPR Dual...-VNIR Hyperspectral VNIR ISRO IASI CNES (EUMETSAT) IASI-NG CNES (EUMETSAT) ICI EPS... spectra budget radiometers monitor TSX-NG Proposed Imaging microwave High resolution... Irradiance Sensor 1 NOAA (NASA) TSX-NG X-Band SAR Waveband: Spatial resolution...