Format for Viking and Pathfinder Differenced Range observations

2 Spacecraft Number : 1 - Viking 1 2 - Viking 2 3 - Pathfinder 4-5 Number of the Transmitting Station (DSS #) 7-8 Number of the Receiving Station (DSS #) 10-29 Date and Time (UTC) of Signal Reception 31-46 Differenced Range measurement [km/sec] 49-53 A priori uncertainty [mm/sec] 56-60 Time-Span of Integration of Signal : interval [seconds] of differenced range, centered on observed UTC