Time and Frequency Standards Laboratory
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The Time and Frequency Standards Laboratory is a part of the National Physical Laboratory in New Delhi which maintains and calibrates the Indian Standard Time.
Features of the Time and Frequency Standards Lab include:
- Four caesium and rubidium atomic clocks
- HF broadcast service operating at 10 MHz under call sign ATA to synchronise the user clock within a millisecond.
- INSAT satellite-based standard time and frequency broadcast service which offers IST correct to ±10 microsecond and frequency calibration up to ±10-10.
- Time and frequency calibrations are made with the help of pico- and nano-seconds time interval, frequency counters, and phase recorders.
