1970-060A
V-70 No. 630 was the first of a pair of probes built for the 1970 window. It was the first to return data from the surface; it transmitted for 35 min during descent and a further 23 min after landing. It reported a temperature of 475C and a deduced pressure of 90 bar. Telemetry problems meant that only temperature was transmitted during descent. The parachute apparently failed a few meters above the surface. At first it was thought that no signals had been detected from the surface, since the antenna was pointed away from Earth, but a week later, after some processing, 23 minutes of data was extracted. The larger spacecraft mass required a more powerful booster, the Blok-NVL, with 140 kg more propellant than the Blok-VL.
| Venera-7 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1970 Aug 17 | 0538 | Launch by 8K78M | KB |
| 0542? | Blok-A sep | ||
| 0542? | Blok-I burn | ||
| 0547? | Blok-I sep | 88.51 174 x 233 x 51.70 | |
| 0650? | BOZ sep | ||
| 0651 | Blok-L burn T+1:21 for 4:05 | ||
| 0655 | Blok-L sep, solar orbit | ||
| 1970 Oct 2 | TCM | ||
| 1970 Nov 17 | TCM | ||
| 1970 Dec 15 | 0400? | SA sep | |
| 0500 | SA entry | ||
| 0502:50 | ERT AOS | ||
| 0513:10 | Parachute open | ||
| 0534:09 | (SCET) Landing | ||
| 0600:01 | End of transmissions | ||
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