Some details of Katkus gamma ray altimeter with Cs-137 source

Kaktus is made by TsNII RTK, Tikhoretskiy pr. 21, St Petersburg, Russia (rtc@rtc.ru, +7-812-552-0110)

The location of the Cs source on the base of the Soyuz descent module

Design of Soyuz Priborno-Agregatniy Otsek (Instrument-Service Module)

• Soyuz crew manual for US astronauts, 1999 edition
• A. Zak's page (1)
• A. Zak's page (2)
• Wikipedia page on the service module propulsion system
• Wikipedia page on the service module main rocket engine

Some sources for Kaktus

• (1)
• (2)
• (3)