| 词条 | Stretched Rohini Satellite Series |
| 释义 |
| image = | caption = | name = Stretched Rohini Satellite Series | manufacturer = ISRO | country = India | applications = Gamma ray astronomy | orbits = Low Earth | operator = ISRO | lifetime = 2 years | derivedfrom = Rohini | status = Retired | built = 4 | launched = 4 | retired = 1 | lost = 3 | first = SROSS-A 24 March 1987 | last = SROSS-C2 4 May 1994 | lastretired = |autoconvert = off | mass = {{convert|106|-|150|kg|lb}} | power = ~100 watts | batteries = Ni-Cd | equipment = Gamma-Ray Burst Retarded Potential Analyser{{citation needed|date=October 2013}} | dimensions = | x_axis = | y_axis = | z_axis = }} The Stretched Rohini Satellite Series (SROSS) are a series of satellites developed by the Indian Space Research Organisation as follow ons to the Rohini Satellites[1] for conducting astrophysics, Earth Remote Sensing, and upper atmospheric monitoring experiments as well as for new and novel application-oriented missions.[2] These satellites were the payload of the developmental flights of the Augmented Satellite Launch Vehicle.[1] Satellites in seriesSROSS A And SROSS BThe first two satellites in the series did not make it into orbit due to launch vehicle failure. SROSS-A carried two retro-reflectors for laser tracking.[1] SROSS-B carried two instruments; a West German Monocular Electro Optical Stereo Scanner (MEOSS) and ISRO's 20-3000keV Gamma-ray Burst Experiment (GRB).[1] SROSS CThe third, SROSS 3 (also known as SROSS C), attained a lower-than-planned orbit on 20 May 1992. The GRB monitored celestial gamma ray bursts in the energy range 20–3000 keV. SROSS C and C2 carried a gamma-ray burst (GRB) experiment and a Retarded Potential Analyzer (RPA) experiment. The GRB experiment operated from 25 May 1992 until reentry on 14 July 1992. The instrument consisted of a main and a redundant CsI(Na) scintillator operating in the energy range 20–3000 keV. The crystals were 76 mm (main) and 37 mm (redundant) in diameter. Each had a thickness of 12.5 mm. A 'burst mode' was triggered by the 100–1024 keV count rate exceeding a preset limit during a 256 or 1024 ms time integration. In this mode, 65 s of temporal and 2 s of spectral data prior to the trigger are stored, as well as the subsequent 16 s of spectral data and 204 s of temporal data. The low resolution data consists of two energy channels (20–100 keV and 100–1024 keV) from 65 s before the trigger to 204 s after the trigger in 256 ms integrations. The 20–1024 keV rates are also recorded with a 2 ms resolution for 1 s prior to 1 s after trigger and a 16 ms resolution for 1s prior to 8 s after the trigger. Energy spectra are conducted with a 124 channel PHA. Four pre-trigger spectra and 32 post-trigger spectra are recorded for every burst with a 512 ms integration time.[3] The RPA measured temperature, density and characteristics of electrons in the Earth's ionosphere.[1] The GRB experiment computer system used the RCA CDP1802 microprocessor.[4] SROSS C2SROSS-C2 was launched on 4 May 1994. The gamma ray burst experiments on board SROSS-C2 are an improved version of the GRB payload flown successfully on the SROSS-C satellite. The improvements include enhancements of the on-board memory and a better measurement of the background spectra after a burst event. These improvements led to the discovery of twelve candidate events detected up to 15 February 1995, out of a total of 993 triggers.[3] The SROSS-C2 spacecraft is one of the satellites included in the Interplanetary Network[5] The SROSS C2 satellite also used an RCA CDP1802 microprocessor for the GRB experiment.[6] See also
References1. ^1 2 3 4 {{cite web |url=http://msl.jpl.nasa.gov/QuickLooks/srossQL.html |title=Archived copy |accessdate=2009-07-19 |deadurl=yes |archiveurl=https://web.archive.org/web/20090411021025/http://msl.jpl.nasa.gov/QuickLooks/srossQL.html |archivedate=2009-04-11 |df= }} {{Indian space programme}}{{Indian spacecraft}}2. ^http://www.astronautix.com/s/sross.html 3. ^1 http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/sross3.html 4. ^{{Cite web|url=http://www.currentscience.ac.in/Downloads/article_id_069_09_0732_0739_0.pdf|title=Cosmic gamma ray bursts - Recent developments and observations from SROSS satellites|last=|first=|date=10 Nov 1995|website=Current Science Research Journal|access-date=}} 5. ^http://www.ssl.berkeley.edu/ipn3/ 6. ^{{Cite web|url=http://articles.adsabs.harvard.edu//full/1997A%26A...322..778K/0000780.000.html|title=Recent gamma-ray burst observations from the SROSS-C2 satellite|last=|first=|date=7 Aug 1995|website=The SAO/NASA Astrophysics Data System|access-date=}} 2 : Human spaceflight programs|Satellites of India |
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