| TIROS-M | |
| Mission type | Weather |
|---|---|
| Operator | ESSA / NASA |
| COSPAR ID | 1970-008A [1] |
| SATCAT no. | 4320 |
| Spacecraft properties | |
| Manufacturer | RCA Astro |
| Launch mass | 309 kilograms (681 lb) |
| Start of mission | |
| Launch date | January 23, 1970, 11:31 UTC [2] |
| Rocket | Delta-N6 |
| Launch site | Vandenberg SLC-2W |
| End of mission | |
| Disposal | Decommissioned |
| Deactivated | June 18, 1971 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth Sun-synchronous |
| Perigee altitude | 1,432 kilometers (890 mi) |
| Apogee altitude | 1,478 kilometers (918 mi) |
| Inclination | 101.99 degrees |
| Period | 115 minutes |
| Epoch | January 23, 1971 |
TIROS-M, also known as ITOS-1 was a weather satellite operated by the Environmental Science Services Administration (ESSA). It was part of a series of satellites called ITOS, or improved TIROS. [3] [4] TIROS-M was launched on a Delta rocket on January 23, 1970. The launch carried one other satellite, Australis-OSCAR 5. [2] It was deactivated on June 18, 1971.