Today the ATA the signal is controlled by the National Physical Laboratory, New Delhi, India
The National Physical Laboratory is the premier research laboratory in India in the field of physical sciences. Established in 1947, it is one of the oldest laboratories of the Council of Scientific and Industrial Research.
Time and frequency measurements, the calibration services offered to users at NPL include:Caesium and rubidium atomic clocks
HF broadcast service operating at 10 MHz under call sign ATA to synchronise the user clock within a millisecondINSAT satellite based standard time & frequency broadcast service offers Indian Standard Time correct upto ±10 microsecond and frequency calibration upto ±10-10. The ATA and INSAT systems provide time synchronization and frequency calibration on a continuous basis
The time and frequency standards at NPL are maintained with the help of four atomic caesium standardsTime and frequency calibrations are made with the help of pico- and nano-seconds time interval and frequency counters and phase recorders
Accuracies available for Timeinterval (Frequency).