GSAT-1
Page Module:Message box/ambox.css has no content.
This article needs additional citations for verification. (December 2013) |
Page Module:Infobox/styles.css has no content.Page Template:Infobox spaceflight/styles.css has no content.
| Page Module:Infobox/styles.css has no content. | |
| Mission type | Communications Technology |
|---|---|
| Operator | ISRO |
| COSPAR ID | 2001-015A |
| SATCAT no. | 26745 |
| Mission duration | Failed to reach orbit |
| Page Module:Infobox/styles.css has no content. | |
| Spacecraft properties | |
| Bus | I-2K |
| Manufacturer | ISRO |
| Launch mass | 1,540 kilograms (3,400 lb) |
| Page Module:Infobox/styles.css has no content. | |
| Start of mission | |
| Launch date | Template:Start-date UTC |
| Rocket | GSLV Mk.I |
| Launch site | Shiharikota FLP |
| Contractor | ISRO |
| Page Module:Infobox/styles.css has no content. | |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Medium Earth Geostationary planned |
| Longitude | 73° west (2000) 99° west (2000–2006) 76.85° west (2006–2009) |
| Perigee altitude | 33,800 kilometres (21,000 mi) |
| Apogee altitude | 35,725 kilometres (22,198 mi) |
| Inclination | 0.9 degrees |
| Period | 1384.09 minutes |
| Epoch | 25 April 2001[1] |
| Page Module:Infobox/styles.css has no content. | |
| Transponders | |
| Band | 3 C-band 2 S-band |
| Template:Succession links Template:Succession links | |
Script error: No such module "Check for conflicting parameters".
GSAT-1 was an experimental communications satellite launched aboard the maiden flight of the GSLV rocket. The spacecraft was equipped with instrumentation to test Pulse-code modulation (PCM) transmitting on S-band frequencies and transponders operating in the C-band.[2] The spacecraft was unable to complete its mission after a launch failure left it in a lower than planned orbit and propulsion issues prevented the satellite from correcting this via its own maneuvering system.
Overview
GSAT-1 failed to achieve its target orbit, which prevented it from fulfilling its primary communications mission. The 1.54-tonne satellite was orbiting with a period of 23 hours two minutes, instead of the planned 24-hour geosynchronous orbit, only permitting a limited series of experiments to be conducted, including digital audio broadcasting and compressed digital TV signal transmission.
The GSLV (Geosynchronous Satellite Launch Vehicle) suffered a performance shortfall during its first flight resulting in the injection of the experimental satellite into a geosynchronous transfer orbit (GTO) of 181 x 32.051 km, inclined at 19.2 degrees, having an apogee about 4,000 km below the targeted orbit of 185 x 35.975 km. The satellite used its onboard propulsion system to raise both its apogee and its perigee to geostationary orbit as well as to decrease the orbital inclination to zero, however its propellant was depleted prior to successfully raising its orbit. The satellite used two different propellant tanks, built in Germany and India, which resulted in an unequal flow of fuel, causing the spacecraft to tilt. (The two different fuel tanks were used because they were readily available). Recovery required the use of more propellant than planned which resulted in the satellite having no propellant left to complete its final circularization maneuver. The satellite was possibly used for a few communications experiments but the original purpose of demonstrating digital TV and audio broadcasts, as well as Internet services could not be fulfilled.
The Russian 12KRB cryogenic upper stage was planned to perform for 710 seconds, but its burn apparently lasted only 698 seconds. Another suspect for the shortfall is the launch vehicle navigation system which was derived from the PSLV which has flown only to low earth orbits.
Launch attempt summary
| Attempt | Planned | Result | Turnaround | Reason | Decision point | Weather go (%) | Notes |
|---|---|---|---|---|---|---|---|
| 1 | Script error: No such module "sort". | Scrubbed | — | Script error: No such module "sort". | Abborted due to some engines related issues in the terminal count. | ||
| 2 | Script error: No such module "sort". | Partial failure | 21 days 0 hours 13 minutes | Payload placed into lower than planned orbit, and did not have sufficient fuel to reach a usable orbit. |
See also
Lua error in mw.title.lua at line 404: bad argument #2 to 'title.new' (unrecognized namespace name 'Portal').
References
- ^ Page Module:Citation/CS1/styles.css has no content.McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 27 September 2013.
- ^ Page Module:Citation/CS1/styles.css has no content."GSAT-30: Advancing India's Communication and Digital Connectivity". Environmentsandscience. 2025-01-17. Retrieved 2025-01-17.
Lua error in package.lua at line 80: module 'Module:Navbox/configuration' not found. Lua error in package.lua at line 80: module 'Module:Navbox/configuration' not found. Lua error in package.lua at line 80: module 'Module:Navbox/configuration' not found.
