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astronautix.com SROSS


Other Designations: Stretched ROhini Satellite Series. Class: Earth. Type: Magnetosphere. Nation: India. Agency: ISRO (Indian Space Research Organization). Manufacturer: ISRO.

The Indian Space Research Organisation (ISRO) developed the SROSS (Stretched Rohini Satellite Serie) spacecraft as follow-ons to the successful Rohini satellite series. The SROSS vehicles were designed to carry small scientific and technology payloads, including astrophysics, Earth remote sensing, and upper atmospheric monitoring experiments. The vehicles were launched aboard developmental flights of India's new ASLV launcher. SROSS 1, intended primarily to monitor launch vehicle performance, was lost when the 1st flight of the ASLV ended in failure. SROSS 2 was destroyed in the loss of the 2nd ASLV flight a year later. The third vehicle, SROSS C, was successfully placed into orbit, although in a much lower than planned orbit. The vehicle decayed on 14 July 1992, and although it returned some scientific data, was deemed only a partial success due to its much earlier than planned re-entry. SROSS C2 was the first unqualified success of the SROSS and ASLV programs. Spacecraft: Spin-stabilised. Octagonal structure. Body mounted and deployable solar panels provide ~100W (SROSS C2 had only body mounted panels). NiCd battery. Payload: Payload capacity of 15-35 kg. SROSS 1: : carried two retro-reflectors for laser tracking. SROSS 2: : carried two instruments; a West German Monocular Electro Optical Stereo Scanner (MEOSS) and ISRO's 20-3000keV Gamma-ray Burst Experiment (GRB). SROSS C and C2: : carried a gamma-ray burst (GRB) experiment and a Retarded Potential Analyser (RPA) experiment. The GRB monitored celestial gamma ray bursts in the energy range 20-3000 keV. The RPA measured temperature, density and characteristics of electrons in the Earth's ionosphere.


Specification

Design Life: 2-4 years. Total Length: 1.1 m. Maximum Diameter: 0.8 m. Total Mass: 130 kg.


SROSS Chronology


24 March 1987 SROSS A Launch Site: Sriharikota . Launch Vehicle: ASLV. FAILURE: Second stage failed to ignite. Mass: 150 kg.
12 July 1988 SROSS B Launch Site: Sriharikota . Launch Vehicle: ASLV. FAILURE: First stage failure. Insufficient control gain. Mass: 150 kg.
20 May 1992 SROSS 3 Launch Site: Sriharikota . Launch Vehicle: ASLV. FAILURE: Insufficent spin stabilisation of fifth stage. Partial Failure. Mass: 106 kg. Perigee: 251 km. Apogee: 436 km. Inclination: 46.0 deg.

Stretched Rohini Satellite Series; carried gamma-ray detector, ionosphere monitor. SROSS-C satellite carries two scientific payloads: 1) Retarding Potential Analyser (RPA), consisting of two planar detectors to measure plasma parameters and investigate energetics of the equatorial ionosphere. (2) Gamma Ray Burst (GRB) detectors, consist ing of two scintillation detectors to study celestial gamma ray bursts in the energy range of 20 keV to 3000 keV. Launch vehicle: Augmented Satellite Launch Vehicle.


04 May 1994 SROSS-C2 Launch Site: Sriharikota . Launch Vehicle: ASLV. Mass: 113 kg. Perigee: 437 km. Apogee: 938 km. Inclination: 46.2 deg.

Streched Rohini Satellite Series; measured ionospheric plasma and gamma rays. SROSS-C2 satellite carries two scientific payloads: (i) Retarding Potential Analyser (RPA), consisting of two planar detectors to measure plasma parameters and investigate energetics of the equatorial ionosphere. (ii) Gamma Ray Burst (GRB) detectors, cons isting of two scintillators to study celestial gamma ray bursts in the energy range of 20 keV to 3000 keV. Launch vehicle Augmented Satellite Launch Vehicle ASLV-D4.



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Last update 12 March 2001.
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