MESSENGER RSS Light Time Record (LTF)

LTF – Light Time Record

Instrument: MESSENGER Radio Science Experiment

PDS Data Set ID: MESS-V/H-RSS-1-EDR-RAWDATA-V1.0

For more information about RSS LTF products, see the LTF Product SIS.

The Radio Science Subsystem (RSS) Light Time Record (LTF) files provide one-way light travel time values for both the upleg and downleg directions between the MESSENGER spacecraft and the three Deep Space Communications Complex (DSCC) facilities. This product was produced by the navigation team every month or so during mission operations and on selected intervals from improved reconstructed ephemeris. The data are in table form.

RSS LTF products have the following file names:

MESS_RS_yyyyddd_yyyyddd_LTF.TXT (with detached PDS label)

where:

MESS = mission = MESSENGER

RS = instrument = Radio Science Subsystem

yyyyddd = start date, year and day

yyyyddd = stop date, year and day

LTF = product type = Light Time file

In ODE, LTF products have the following product IDs:

MESS_RS_YYYYDDD_YYYYDDD_LTF