Використання вільного програмного та апаратного забезпечення для точної реєстрації часових міток подій.

Abstract

Precise timing is one of the keystones for modern astronomical observations. The local timing service of the telescope Zeiss-600 at International Center for Astronomical, Medical and Ecological Research was upgraded. Its hardware consists of the GPS receiver and micro-PC RaspberryPi with RS422-to-TTL convertor. The corresponding software (Raspbian OS based) provides the necessary operations: timing data storage on SD card with access via ssh or ftp, providing local ntp server (it is synchronized over the public Internet and/or by PPS from GPS receiver). The developed ntp server maintains time to within 0.004 ms jitter (accuracy), that is 100 times better than without GPS.