Please be aware that for FPI (not necessarily other MMS instruments), the telemetry output is variable. The FPI IDPU compression ASIC is tuned to produce packets that stay within FPI's allocation cap for that spacecraft. Depending on the environment the FPI data stream may be somewhat below or above that cap. Thus, the difference between Average and Peak rates.
The burst data is stored onboard and about 5% is selected and downlinked (about 200-300 minutes per 3 day orbit). All of the Fast Survey is downlinked, about 40 hours worth is collected per 70+hour orbit. FPI Slow Survey data is <1% of the total.
information on this page provided by Alex Barrie