The Clementine spacecraft used a lunar transfer booster called
the ISAS (InterStage Adapter Satellite) to get it from
the Earth to the Moon.
The ISAS consisted of a Thiokol Star 37FM solid rocket booster
and some interstage adapter hardware. The adapter was cylindrical in
shape and contained a small 5 kg instrument package mounted on an
inside wall. A simple transceiver permitted communications with Earth,
and solar panels wrapped around the adapter provided power. The
adapter had no attitude control, but was spin stabilized during the
The instrument package on ISAS contained a radiation monitor, a
dosimeter, and an instrument to determine damage to both radiation
hardened and soft CMOS (complementary metal oxide semiconductor)
devices. The devices that were studied included a LCCD (linear charged
coupled device), a EEPROM (electrically erasable programmable
read-only memory), FGPA (field gate programmable array), and an SRAM
(static random access memory). Impact detectors provided information
on meteorite and debris interactions with the spacecraft in a near
After boosting Clementine away from Earth, ISAS was left in an
elliptical Earth orbit of about 300 km by 127,000 km with an
inclination of 67 degrees. This orbit saw ISAS pass through the Van Allen radiation belts, debris fields, interplanetary
radiation, and micrometeorite environments.
The Clementine interstage adapter satellite bears the NSSDC
(National Space Science Data Center) ID 1994-004C. The information
presented here was obtained from http://nssdc.gsfc.nasa.gov/.