ACARR is using the German-manufactured, WMO-approved GRAW Radiosonde system from 2014 onward. The program mainly consisted of gathering information describing the atmosphere at various levels up to the lower stratosphere, from the locations 10.03° N and 76.33° E, which is at a height of 32 m above mean sea level. The GRAW Radiosonde system consists of one Ground station unit connected to one omnidirectional dipole antenna with Low Noise Antenna, One GPS antenna with GPS repeater, and one host PC with Grawmet software pre-installed.