1962-002A
Tiros IV (A-09, Tiros D), the fourth hatbox Tiros, was launched on 1962 Feb 8 at 1244, by Delta (317/2020/3020) and transmitted until 1962 Jul 19. The launch vehicle placed it in an orbit with a somewhat higher apogee than planned. In Dec 1993 Tiros IV was in a 693 x 812 km x 48.3 deg orbit.
Tiros IV pioneered ice reconnaissance with the NASA/WBu/USN/Canada project TIREC which compared airbone imagery with satellite data. The NASA/USAF Project Bright Cloud studied classification of cloud shape and brightness.
Archival TLEs for Tiros 4 are more consistent with an 1144 UTC launch time, but the primary source documents seem consistent; an error in the TLEs seems indicated.
| Tiros 4 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1962 Feb 8 | 1243:45 | Launch by Delta | CC LC17A |
| T+2:20 Altitude 80 km | |||
| 1245:24 | T+2:39 Thor 317 MECO | -5456 x 619 x 47.25 | |
| 1245:29 | T+2:44 Delta 2020 SES 1:48 | ||
| T+3:04 Fairing | |||
| 1248:17 | T+4:32 Delta SECO | -3793 x 743 x 48.1 | |
| Coast for 7:15 | |||
| 1255:30 | T+11:45 St 3 spin rockets | ||
| 1255:32 | T+11:47 St 2 sep | -3787 x 742 x 48.1 | |
| 1255:45 | T+12:00 Altair X248A5 SV-117 3020 burn | ||
| 1256:27 | T+12:42 Altair burnout | ||
| 1306 | Delta St 2 reentry, impact, 17W 48N? | ||
| 1306:56 | T+22:50 Altair sep | ||
| 1310:45 | Tiros despin | ||
| 723 x 873 x 48.3 (DAC vels) | |||
| 721 x 855 x 48.30 (DAC) | |||
| 706 x 833 x 48.3 | |||
| 1962 Jul 19 | End of tx | ||
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