Relevant Iris Telemetry Fields for Computing Time and Total Count Phase

Field NameSizeDescription
1PPS Count4 bytesRunning integral count of 1PPS seconds, which can accumulate up to 232 seconds (or approximately 136 years)
Iris Time (seconds)4 bytesCount of seconds since Iris was turned on based on TCXO ticks; increments each time the subseconds counter rolls over
Iris Time (subseconds)4 bytesCount of 50-MHz TCXO ticks; rolls over to 0 after 49,999,999
Total Carrier Phase (TCP)8 bytesIntegral number representing the total count phase since carrier lock; determines a floating-point estimate of phase cycles using Embedded Image