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“Tinned Copper Braid” is planned to be used in IRS-1C spacecraft for the thermal control of the detector of the “Middle Infra Red” (MIR) band of LISS III Camera. The thermal conductance of the braid was evaluated experimentally in the temperature range of -65°C to +35°C by employing the calorimetric technique. The measured thermal conductance of the 215mm long copper braid varies from 0.051 to 0.056 W/°C at different temperatures in the specified range. An error estimation has been performed which shows a maximum uncertainty of better than ± 5% on the conductance value measured.

Space quality 12Ah hermetically sealed, dry powder sintered plaque, electrochemically impregnated prismatic nickel cadmium cells with special negative treatment have been designed and developed by Vikram Sarabhai Space Centre (VSSC), a unit of Indian Space Research Organisation (ISRO) for use on LEO Satellites. Five cells have undergone detailed qualification tests and are undergoing real time life cycling at ISRO Satellite Centre (ISAC). This paper gives details of the cell development and testing and discusses certain aspects like negative treatment, cell storage and cycling test results of 6000 cycles which have been completed so far.