Beskrivning : The Pioneer Venus Multiprobe (PVM, Pioneer 13) consisted of a bus which carried one large and three small atmospheric probes. The large probe was released on 16 November 1978 and the three small probes on November 20. All four probes entered the Venus atmosphere on December 9, followed by the bus.
The radio signals from all four probes were also used to characterize the winds, turbulence, and propogation in the atmosphere. The small probes were each targeted at different parts of the planet and were named accordingly. The North probe entered the atmosphere at about 60 degrees north latitude on the day side. The night probe entered on the night side. The day probe entered well into the day side, and was the only one of the four probes which continued to send radio signals back after impact, for over an hour.
Kennedy Space Center post stamp and Venus sonde.

USA 1166 - image retouchée ?

Sida : future · Ref: USA 1166 

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PIONEER 13 (PIONEER VENUS 2) · VENUS MULTIPROBE · ATLAS SLV3D