IRS Satellite Bus
Data current as of 2026-07-20.
The IRS bus accounts for 19 cataloged objects, of which 17 are in orbit and 7 are active. 2 have reentered. Most are built by ISAC/HAL. The largest operator on this bus is Indian Space Research Organisation. The first launched in 1988, the most recent in 2022.
17
In orbit
7
Active
19
Total launched
2
Reentered
IRS launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged IRS satellites.
| Manufacturer | ISAC/HAL |
|---|---|
| Purpose | Earth observation |
| Launch mass | 1000 kg |
| Dry mass | 950 kg |
| Length | 2.8 m |
| Diameter | 2 m |
| Span | 12 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | AOCS |
| Design life | 5 years |
| Equipment | C-Band SAR |
| Typical orbit | 101 min period, 99° inclination |
Top operators
Indian Space Research Organisation 18 ISRO/CNES 1
Top countries
IN 19
IRS satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| EOS-6 (OCEANSAT-3) EOS-06 | 54361 | 2022-158A | ISRO | Nov 26, 2022 | 100 min, 98.4° | Active | ◉ |
| EOS-4 EOS-04 | 51656 | 2022-013A | ISRO | Feb 14, 2022 | 95 min, 97.5° | Active | ◉ |
| RESOURCESAT-2A Resourcesat-2A | 41877 | 2016-074A | ISRO | Dec 7, 2016 | 101 min, 98.8° | Active | ◉ |
| MARS ORBITER MISSION Mars Orbiter Mission | 39370 | 2013-060A | ISRO | Nov 5, 2013 | 5574 min, 19.4° | Inactive | ◉ |
| RISAT-1 RISAT-1 | 38248 | 2012-017A | ISRO | Apr 26, 2012 | 92 min, 97.4° | Inactive | ◉ |
| MEGHA-TROPIQUES Megha-Tropiques | 37838 | 2011-058A | ISRO/CNES | Oct 12, 2011 | 91 min, 20.0° | Reentered | ◉ |
| RESOURCESAT-2 Resourcesat-2 | 37387 | 2011-015A | ISRO | Apr 20, 2011 | 101 min, 98.8° | Active | ◉ |
| OCEANSAT-2 Oceansat-2 | 35931 | 2009-051A | ISRO | Sep 23, 2009 | 103 min, 98.2° | Active | ◉ |
| CHANDRAYAAN-1 Chandrayaan-1 | 33405 | 2008-052A | ISRO | Oct 22, 2008 | 8472 min, 18.1° | Inactive | ◉ |
| IRS-P5 (CARTOSAT-1) Cartosat-1 | 28649 | 2005-017A | ISRO | May 5, 2005 | 97 min, 97.5° | Active | ◉ |
| IRS-P6 (RESOURCESAT-1) Resourcesat | 28051 | 2003-046A | ISRO | Oct 17, 2003 | 100 min, 98.2° | Active | ◉ |
| TES TES | 26957 | 2001-049A | ISRO | Oct 22, 2001 | 87 min, 97.8° | Reentered | ◉ |
| IRS-P4 (OCEANSAT-1) Oceansat | 25758 | 1999-029C | ISRO | May 26, 1999 | 99 min, 98.0° | Inactive | ◉ |
| IRS-1D IRS-1D | 24971 | 1997-057A | ISRO | Sep 29, 1997 | 100 min, 98.8° | Inactive | ◉ |
| IRS-P3 IRS-P3 | 23827 | 1996-017A | ISRO | Mar 21, 1996 | 101 min, 99.0° | Inactive | ◉ |
| IRS-1C IRS-1C | 23751 | 1995-072A | ISRO | Dec 28, 1995 | 101 min, 99.0° | Inactive | ◉ |
| IRS-P2 IRS-P2 | 23323 | 1994-068A | ISRO | Oct 15, 1994 | 101 min, 98.9° | Inactive | ◉ |
| IRS-1B IRS-1B | 21688 | 1991-061A | ISRO | Aug 29, 1991 | 103 min, 99.4° | Inactive | ◉ |
| IRS-1A IRS-1A | 18960 | 1988-021A | ISRO | Mar 17, 1988 | 103 min, 98.8° | Inactive | ◉ |
Frequently asked questions
How many IRS satellites are there?
The catalog lists 19 objects built on the IRS bus. 17 are in orbit and 2 have reentered.
How many IRS satellites are in orbit?
17 IRS objects are currently in orbit, of which 7 carry an active status.
Who builds the IRS bus?
The IRS bus is most commonly built by ISAC/HAL.
When did the first IRS satellite launch?
The first cataloged IRS satellite launched in 1988, and the most recent in 2022.