I.R.SPECTROPHOTOMETRIC DATA LOGGING and  PROCESSING COMPUTER,
 Installed at C.A.S.A 
IR PhotoMultiplier maintained in dry ice was interfaced to a 
discriminator and x charge amplifier,
 digitized and data stored in memory. The dispersion was through 
diffraction grating operated by a stepper motor with correction of 
backlash errors. The equipment was built into the 48 inch telescope at 
Nizamiah Observatory (Japal Rangapur).
Software- language  Assembly and BASIC for control and user interface. 
Scanning of the star under study over a range of wavelengths and 
repeating the same 'n' times to average out air turbulence and cloud 
affects .Display the buildup of the spectrum on a CRO for study. 
Computation of the magnitude at various specified wavelengths.