Спутник ДЗЗ. Corvus-BC 2. [Редактировать]

Компания Astro Digital (Aquila Space, сформирована выходцами из Dauria Space) разработала данные 6-и юнитовые кубсаты для проведения съемки Земли. Конструктивно эти КА базируются на научно-техническом заделе полученном при разработке КА Perseus-O. Космические аппараты способны снимать Землю в красном, зеленом и ближнем ИК диапазонах. Разрешение составляет 22 метра на точку. 

Дополнительная классификация

#Наименования
1Тип орбиты - НОО
2Страна оператор(владелец) - США
3Страна производитель - США
4Тип оператора(владельца) - коммерческий
5Все спутники ДЗЗ

Технические характеристики

#ХарактеристикаЗначение
1Масса, кг10
2Пространственное разрешение в надире, метра22
3Спектральные диапазоны
4Зеленый, мкм0.52-0.60
5Красный, мкм0.63-0.68
6Ближний ИК, мкм0.77-0.90
7Скорость (передачи информации на Землю), Мбит/с40
8Полоса захвата, км220

Найдено 32 документов по запросу «Corvus-BC 2». [Перейти к поиску]


Дата загрузки: 2017-01-30
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SSC15 – VI - 8 Ka-Band for CubeSats Jan A. King Houahang Aghahassan Michael Bertino Brian Cooper Jin Kim Kyle Leveque 29th Annual AIAA/USU Conference on Small Satellites August 11, 2015 Introduction It is Highly Evident that Small Satellite Missions are Becoming Throughput Bound Contemporary Modest Requirement • Small Satellite Sensor/ Data Generator: • 4-5 watts (100% duty factor) • 100 Million Pixel Data Array • (10,000 X 10,000 Array) • 10 Bit per Pixel • Store 100 Events (Images) / Orbit • Factor of 2 Lossless Compression ______________________________ • • • • 10E+11 bits per orbit 5 X 10E+10 compressed bits/orbit 14 Orbits/ Day 7 X 10E +11 compressed bits/day 8/9/2015 …And, Resultant Data Rate Expectation Downlink Consequences: • Downlink 4 Passes/Day • 11 Minutes/Pass (Average) _________________________ • 2640 sec/day downlink time • Required data rate to downlink 7 X 10 E +11 bits: • 265.2 Mbps 2 Our Background • • • • • 17-person team in Silicon Valley Core engineering team worked at Canopus Systems 100% of current team completed Perseus-M mission Broad range of experience in the space industry Now focused on generating 22m and 2.5m multi-spectral Earth imagery SRI –RAX 1 Perseus-M 8/9/2015 4/23/15 LightSail SSL-ABS2 AMSAT – OSCAR Series 3 Current Projects • Perseus-M • Launched in June 2014 • 2x 6U Automatic Identification System (AIS) CubeSat • Characterizing AIS payload performance • On-orbit test bed for future missions • Corvus-BC • Launch Q1 2016 • 4 x 6U remote sensing CubeSat • Multispectral: Red, Green, NIR • 22 m GSD • Corvus-HD • • • • 4/23/15 Launch Q3 2016 4 x 16U remote sensing CubeSat Multispectral: Red, Green, Blue, NIR, Red Edge 2.5 m GSD 4 Ka-Band ITA (1st Gen) (Integrated Transmit Assembly) 8/9/2015 5 ITA With Modulator & Coder (2nd Generation) 8/9/2015 6 Corvus-BC Overview Flight Control System (“the rack”) • • • • UHF Radio GPS Radio EPS boards Batteries Imaging Payload Open volume for future use (Propulsion!) Star-tracker & Reaction Wheels 8/9/2015 Ka-Band Transmitter 7 Corvus-HD Overview • Upgraded bus to be used for Corvus-HD, launching Q3 2016 • Improved ACS accuracy and availability • >200 Mbps data transfer with adaptive ModCod • Miniaturized Ka Transmitter assembly • S-Band, UHF, and Globalstar radios included • Results in high command & telemetry availability (>20%) • Doubled battery capacity 8/9/2015 8 26.8 GHz Spectrum @ 0.6 W RF (27.8 dBm SSPA Power Output) 8/9/2015 @ Approximately -1 dB Compression Point 9 In-Orbit Performance to Date (Perseus-M1 and –M2) 8/9/2015 10 Horn Measured Pattern (Co-Polarized = RHCP) MAX = 23.2 dBi ----- Blue Plot: φ = 0°; θ Cut from -90° to +90° ----- Red Plot: φ = 90°; θ cut from -90° to +90° 8/9/2015 11 Horn Measured Pattern (Cross-Polarized = LHCP) MAX = 7.1 dBi ----- Blue Plot: φ = 0°; θ Cut from -90° to +90° ----- Red Plot: φ = 90°; θ cut from -90° to +90° 8/9/2015 12 Link Budget For CW Case (10 kHz BW) 13 First 26.8 GHz Tests at Svalbard, Norway May 20, 2015 June 2, 2015 June 10, 2015 8/9/2015 14 Current Best Result from Svalbard, Norway June 10, 2015 8/9/2015 15 Second Generation Ka-Band Transmitter • • • • ITA  Leave As Is Horn Antenna  Leave As Is Modulator  Leave As Is Add New DVB-S2 Encoder • QPSK Steps Only • Steps 1 Thru 12; Except Skip Step 10 • Leave Nyquist Filter at 25 MHz; R = 0.2 8/9/2015 16 2nd Generation Ka-Band Configuration 8/9/2015 17 2nd Generation DVB-S2 MODCOD Settings 8/9/2015 18 DVB-S2 Downlink Set-Up (DVB-S2 Demod & Signal Analyzer) 8/9/2015 Under Test: MODCOD Step 1: QPSK @ R=1/4 19 Test Results of All 11 MODCOD Steps * No Step 10 * NOTE: Test Run for 10s of Minutes per MODCOD Setting 8/9/2015 20 The Effects of Intermodulation 8/9/2015 21 Third Generation Ka-Band Transmitter • • • • ITA  Leave As Is Horn Antenna  Leave As Is Modulator  Remove Add Expanded DVB-S2 Encoder • • • • Implement All 28 DVB-S2 MODCOD Steps Incorporate New Modulator into Coder Increase Nyquist Filter Bandwidth to at 87 MHz; R = 0.2 Utilize System in ACM • Watch This Space: 3 months to Readiness 8/9/2015 22 3rd Generation Expected Performance in ACM Orbit Predictions Ground Station at Svalbard, Norway Avg. Data Rate: 205 Mbps Link Results 8/9/2015 23 DARPA Sat-to-Sat Relay BAA (What IF?) 8/9/2015 24 Spectrum Management for Ka-Band EESS (Remote Sensing) Missions 8/9/2015 25 Questions? 8/9/2015 26



Дата загрузки: 2017-02-23
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... Spacecraft  Manufacturing:  Lessons  Learned  from  Corvus-­‐BC Brian  Cooper SUPERNOVA-­‐Beta  TechSat...



Дата загрузки: 2016-11-12
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...‐6, United States  (1)  Aquila Space, Inc. CORVUSBC, United States (1)  Planet Labs, Inc...



Дата загрузки: 2016-12-29
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... ancient Greek astronomer Hipparchus (c. 120 BC). Hipparchus recognized six classes of... back to about 12,000 BC, around the time of the... Nile flood) in 4242 BC, 2782 BC, and 1322 BC. Which of these... got its start before 4000 BC. We now believe that not until about 3500 BC was there a “unification of Nile... not until more like 3100 BC or later did the dynasties... have been instituted around 2782 BC (probably a few hundred years before... Eleusinian mysteries started before 1000 BC (which is what some authorities... first time, probably around 2782 BC), today we enjoy the coincidence... lived in the third century BC. Kunitzsch states that there “seem... lived in the first century BC, said that the name Canopus... occurred in the twelfth century BC. About a thousand years later, the... dates back to about 2000 BC. One thing for sure is... date back to around 4000 BC, when it marked the vernal... can “continue the curve to Corvus.” Corvus, the Crow, is 208 | The... to Spica. The middle of Corvus’s conspicuous rhomboid of stars is... branches) is to look for Corvus to the right of Spica... seen from the Northern Hemisphere). Corvus is actually somewhat south of... southeast, Corvus leading. More often, the identification function between Corvus and Spica... Spica as a guide to finding Corvus. But these are just the... very much more prominent than Corvus: the Southern Cross. Of course... place in historic times—117 BC. Pollux is also more interesting... “Hastorang” in Persia—in 3000 BC, when it was considered one..., Aldebaran, and Antares.) Around 500 BC Fomalhaut was also supposed to... middle of the third millennium BC— when the Egyptians noted it... Greek astronomer Hipparchus. Around 130 BC, he made the discovery by... the way back to 2100 BC (almost a thousand years before the... and Jupiter in August 3 BC and June 2 BC. Regulus doesn’t change its... Centauri B. From Regulus, the Regulus BC pair would shine at about... Caroli, 210 Corona Borealis, 128 Corvus, the Crow, 209 Cowherd (Altair...



Дата загрузки: 2017-01-23
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... over development in Common Ravens (Corvus corax), as well as the... Victoria, Dept. of Biology, Victoria, BC V85 3N5, Canada, mclinchy@uwo..., 3041-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada, kmartin@interchange..., Department of Biological Sciences, Burnaby, BC, Canada, tdwillia@sfu.ca Over... in erythrocytes of individual Jackdaws (Corvus monedula) in relation to social... provided ad libitum and ravens (Corvus corax), potential predators of young... performance of the Common Raven (Corvus corax) has been studied for... foliage, free-flying Fish Crows (Corvus ossifragus) detect the strongly chromatic... co-occurrence of Hooded Crows (Corvus corone) and Pine Martens. In... predation by the American Crow (Corvus brachyrhynchos) threaten them there. Sample... catus) and the Jungle Crow (Corvus macrorhynchos). Further predator control is... Common Magpies (Pica pica), crows (Corvus spp.), pigeons and squirrels were... roadkilled carcasses. The Australian Raven (Corvus coronoides) Wedge-tailed Eagle (Aquila...@sascharoesner.de The Common Raven (Corvus corax) is one of the... acceptance in a corvid, the Rook (Corvus frugilegus). In Experiment 1, we show... aeruginosus), Carrion Crow (Corvus corone), Common Raven (Corvus corax) and White Stork... visually-oriented predators: Hooded Crows (Corvus corone) and Marsh Harriers (Circus....jp Carrion Crows (Corvus corone) and Jungle Crows (Corvus macrorhynchos) are common... in the African Black Coucal (bc) and the White-browed Coucal... clutches similar in size. The bc is classically polyandrous: males typically... time. Preliminary data suggest that bc males fed the young at... presence of the female. Female bc did not participate in parental... bi-parental care. In the bc, the reproductive success for females... territory size in Common Ravens (Corvus corax) during the breeding season...



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... 0% 0 D E D 40 10 100 1000 10000 BC BC Remnant area (ha) b) Woodland Plains... Woodland No. Woodland bird spp. D BC A A BC D 12 10 8 6 4 2 0 0 10 20 30... are: Hill Communities (A); Woodland Plains (BC); Yellow Box – Blakely’s Red Gum... are + one standard error. 43 F E BC A D F E D BC A 0 10 20 30 40 0 10 20 30 40 D D BC 0 10 20 30 40 10... bird species (birds/ha) 40 A A BC E E F F Mean density of Woodland birds... are: Hill Communities (A); Woodland Plains (BC); Yellow Box – Blakely’s Red Gum... are: Hill Communities (A); Woodland Plains (BC) which was combined Grey Box... community. Family HALCYONIDAE Vegetation community A BC D E P P P P P Azure Kingfisher Laughing Kookaburra PHASIANIDAE... Red-rumped Parrot Vegetation community A BC D E P P P P F P Family CUCULIDAE Cuculus flabelliformis Fan... Australian Magpie Pied Currawong P P P P P P P P P P P P P P P P P P P P P P P Corvus coronoides Corvus mellori Australian Raven Little Raven... Common Starling* P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P F P P P CORVIDAE P Vegetation community A BC D E P P P P P P P P P Daphoenositta chrysoptera Common name Varied... 28 - 0.015 <0.001 <0.001 - A BC D E F Logarea.A Logarea.BC Logarea.D Logarea.E Logarea.F Logarea.BC Logarea.D Logarea.E Logarea.F 0.114 0.032 0.... 0.143 -0.244 Estimate Factor leve A BC D E F Logarea.A A BC D E F Factor level Chance in... Woodland and Fuzzy Box Woodland) (BC), Yellow Box – Blakely’s Red Gum... F: White Box Woodland 8 7 12 36 BC: Woodland Plains 8 Total d.f. 50 Total...



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... per bird: group housed (m2 )bc Minimum height (m) Area per bird... per bird: group housed (m2 )bc BVAAWF/FRAME/RSPCA/UFAW Joint... Pica pica Rook Corvus fructilegus Crow Corvus corone Jackdaw Corvus monedula Chough Pyrrhocorax...



Дата загрузки: 2017-01-23
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... ibis; Oklahoma), and fish crows (Corvus ossifragus; Oklahoma). Birds of 16... virus Viremia* Species‡ Fish crow (Corvus ossifragus) Ring-necked pheasant (Phasianus... egret (Bubulcus ibis) American crow (Corvus brachyrhynchos) American white pelican (Pelecanus... pigeon; RWBB = red-winged blackbird. (Corvus brachyrhynchos), and ring-necked pheasants.../mL serum) except for two Corvus spp. for which all individuals...: 282–289. Ditchkoff SS, West BC, 2007. Ecology and management of...



Дата загрузки: 2017-01-23
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... List [BI, BL] CARRION CROW (Corvus corone corone) Common breeding resident... (RSPB). HOODED CROW (Sub-species Corvus corone cornix) Occasional species. Clwyd... the Llangollen area (JLR). RAVEN (Corvus corax) CIGFRAN now COMMON RAVEN... [SPEC3]Clwyd County rarity. JACKDAW (Corvus monedula) now EURASIAN JACKDAW Common... on 05/02 (SH). ROOK (Corvus frugilegus) Common and widespread colonial..., Sychdyn, and Wych Brook (Wrexham BC); with several winter garden records...



Дата загрузки: 2016-12-21
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... domesticus) und die Amerikanerkrähe (Corvus brachyrhynchos), werden als wichtige Reservoir... S, Samuel MA, Suthar MS, Keller BC, Gale M Jr, Diamond MS (2008b... Chemother 51 (7): 2470-2482. DeHaven BC, Gupta K, Isaacs SN (2011). The... (3): 279-285. Fredericksen BL, Keller BC, Fornek J, Katze MG, Gale M Jr... HM, Komar N, Panella NA, Allen BC, Volpe KE, Davis BS, Roehrig... jays (Cyanocitta cristata) and crows (Corvus brachyrhynchos). Vet Pathol 41 (4): 362...