GSAT-19
Indian communications satellite
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GSAT-19 is an Indian communications satellite launched by the Indian Space Research Organisation aboard an LVM3 on 5 June 2017.[2]
Render of GSAT-19 | |
| Mission type | Communications |
|---|---|
| Operator | INSAT |
| COSPAR ID | 2017-031A |
| SATCAT no. | 42747 |
| Website | GSAT-19 |
| Mission duration | Planned: 10 years[1] Elapsed: 8 years, 9 months, 7 days |
| Spacecraft properties | |
| Bus | I-3K |
| Manufacturer | ISRO Satellite Centre Space Applications Centre |
| Launch mass | 3,136 kg (6,914 lb)[1] |
| Dry mass | 1,394 kg (3,073 lb)[1] |
| Dimensions | 2.0 × 1.77 × 3.1 m (6.6 × 5.8 × 10.2 ft)[1] |
| Power | 4,500 watts[1] |
| Start of mission | |
| Launch date | 5 June 2017, 11:58 UTC[2] |
| Rocket | LVM3-D1[3] |
| Launch site | Satish Dhawan SLP |
| Contractor | ISRO |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 48° E[4] |
| Perigee altitude | 35,470 km (22,040 mi) |
| Apogee altitude | 35,869 km (22,288 mi) |
| Inclination | 0.101 deg |
| Period | 23 hr, 50 min, 10 sec |
| Epoch | 10 June 2017, 02:29 UTC[5] |
| Transponders | |
| Band |
|
| Coverage area | India |
Satellite and payloads
The satellite will act as a testbed for the modular I-6K satellite bus, carrying experimental technologies such as ion thrusters for manoeuvring and stabilisation, active thermal control using thermal radiators, a miniaturised inertial reference unit, indigenously produced lithium-ion batteries, and C-band traveling-wave-tube amplifiers.[6][7][8]
Rather than traditional transponders, GSAT-19 carries four Ku/Ka-band forward link beams and four Ku/Ka-band return link beams, providing much higher data throughput than India's previous communications satellites.[9][10] It additionally carries a Geostationary Radiation Spectrometer (GRASP) payload, which will "monitor and study the nature of charged particles and the influence of space radiation on satellites and their electronic components".[11]
Orbit raising and station keeping
The satellite was launched aboard the LVM3-D1 rocket in the evening of 5 June 2017 to a geostationary transfer orbit perigee of 180 km (112 mi). This was followed by a series of orbit raising operations (using an on-board LAM and chemical thrusters[1]) to place the satellite in the intended geostationary orbital slot.
| Op # | Date/ Time (UTC) |
LAM burn time | Height achieved | Inclination achieved |
Orbital period | References | |
|---|---|---|---|---|---|---|---|
| Apogee | Perigee | ||||||
| 1 | 6 June 2017 08:33 | 116 s | 35,938 km (22,331 mi) | 172.77 km (107.35 mi) | 21.56° | 10 h, 30 min | [12] |
| 2 | 7 June 2017 10:14 | 5538 s | 35,840 km (22,270 mi) | 10,287 km (6,392 mi) | 7.02° | 13 h, 58 min | [13] |
| 3 | 9 June 2017 04:25 | 3469 s | 35,875 km (22,292 mi) | 30,208 km (18,770 mi) | 0.793° | 21 h, 38 min | [14] |
| 4 | 10 June 2017 02:29 | 488 s | 35,869 km (22,288 mi) | 35,470 km (22,040 mi) | 0.101° | 23 h, 50 min, 10 s | [5] |