urn:nasa:pds:mess-rs-raw:calib:mess_rs_2012111_2012111_sff 1.0 1.13.0.0 Product_Observational Simpson, R. A. 2020 Small forces data for MESSENGER maneuvers, migrated from original PDS3 archive to PDS4. 2020-10-16 1.0 These data have been migrated from PDS3 PRODUCT_ID MESS_RS_2012111_2012111_SFF in data set MESS-V/H-RSS-1-EDR-RAWDATA-V1.0 to PDS4. Formatting in the data files has been edited for consistency among files. A new PDS4 label was created as part of the migration process. 2012-04-20T23:06:37.109Z 2012-04-20T23:11:14.109Z Calibration Calibrated Small forces data for cumulative MESSENGER maneuvers migrated from original PDS3 archive MErcury Surface, Space ENvironment, GEochemistry, and Ranging Mission Mission urn:nasa:pds:context:investigation:mission.messenger data_to_investigation MESSENGER Spacecraft urn:nasa:pds:context:instrument_host:spacecraft.mess is_instrument_host Spacecraft Equipment The spacecraft propulsion system is the source of SFF data. urn:nasa:pds:messenger:document-rs:sis-sff data_to_target urn:nasa:pds:messenger:document-rs:sis-sff data_to_document MESS-V/H-RSS-1-EDR-RAWDATA-V1.0:MESS_RS_2012111_2012111_SFF data_to_derived_source_product PDS Geosciences Node The value of external_source_product_identifier is constructed from the PDS3 DATA_SET_ID, an ASCII colon character, and the PDS3 PRODUCT_ID. mess_rs_2012111_2012111_sff.tab 2020-10-16T22:26:06 98343 4854fade6f783825b71d29a098b18fd3

SFF Header 0 164 7-Bit ASCII Text Five keywords and values as provided by the Guidance and Control Team

Start Date and Time Table 164 1 The reference start date and time for the Small Forces Table which follows. START DATE and START TIME are normally set to MESSENGER launch, but other values are allowed. Carriage-Return Line-Feed 2 0 38 START DATE 1 14 ASCII_Date_YMD 10 %10s The reference start date for the Small Forces Table. START TIME 2 25 ASCII_Time 12 %12s The reference start time for the Small Forces Table. Small Forces Table 209 278 The table provides: an estimate of the cumulative delta-V effect of thruster firing, an estimate of the cumulative spacecraft mass loss due to the use of propellant (fuel and oxidizer) while firing thrusters, and an estimate of cumulative on-times for each thruster. The table provides the accumulated values of these quantities since the specified START DATE and START TIME in the Start Date and Time Table, which are normally chosen to be MESSENGER launch. The intent is for each file to present the running history of thruster firing events since the start of the mission. For generality, the capability to specify a start time (or T0) other than launch is provided. Carriage-Return Line-Feed 33 0 353 Index 1 1 ASCII_Integer 5 %5d Record number within the file. Record Type 2 8 ASCII_String 1 %2s Type of the record. For velocity files, permitted values are P = predicted and R = reconstructed. For predicted acceleration files the permitted values are A = continuous and X = discontinuous. Generation Date 3 12 ASCII_Date_YMD 10 %10s Record generation date in format YYYY-MM-DD, taken from the local computer clock. UTC is implied for TMOD computers. Generation Time 4 23 ASCII_Time 12 %12s Record generation time in format hh:mm:ss.sss, taken from the local computer clock. UTC is implied for TMOD computers. DATE 5 39 ASCII_Date_YMD 10 %10s Date of the data in the record in format YYYY-MM-DD in Ephemeris Time (ET). TIME 6 50 ASCII_Time 12 %12s Time of the data in the record in format hh:mm:ss.sss in Ephemeris Time (ET). MET 7 69 ASCII_String 11 %11s second Time tag of the data in Mission Elapsed Time (MET). Mass 8 82 ASCII_Real 9 %9.3f kg Total mass decrement since START DATE and START TIME computed from estimated mass flow rate after each major maneuver and either predicted or reconstructed thruster on times. dVx 9 92 ASCII_Real 11 %11.4f m/s Accumulated change in velocity in the EME2000 x-direction since the START_DATE and START TIME. dVy 10 104 ASCII_Real 11 %11.4f m/s Accumulated change in velocity in the EME2000 y-direction since the START DATE and START TIME. dVz 11 116 ASCII_Real 11 %11.4f m/s Accumulated change in velocity in the EME2000 z-direction since the START DATE and START TIME. QUAT1 12 128 ASCII_Real 11 %11.6f First element of the vector part of the quaternion giving estimated spacecraft attitude at DATE and TIME (fields 5-6) or MET (field 7) minus one second. QUAT2 13 140 ASCII_Real 11 %11.6f Second element of the vector part of the quaternion giving estimated spacecraft attitude at DATE and TIME (fields 5-6) or MET (field 7) minus one second. QUAT3 14 152 ASCII_Real 11 %11.6f Third element of the vector part of the quaternion giving estimated spacecraft attitude at DATE and TIME (fields 5-6) or MET (field 7) minus one second. QUAT4 15 164 ASCII_Real 11 %11.6f Scalar element of the quaternion giving estimated spacecraft attitude at DATE and TIME (fields 5-6) or MET (field 7) minus one second. Prop Mode 16 176 ASCII_Integer 6 %6d Propulsion system operational mode given as one of the following codes: 1) a commanded trajectory correction maneuver (TCM) with small delta-V or a momentum dump using 4.4 N monopropellant thrusters and auxiliary fuel tank; 2) an autonomous event such as an autonomous momentum dump or attitude control using 4.4 N monopropellant thrusters and auxiliary fuel tank; 3) a commended TCM with intermediate delta-V using 22 N monopropellant thrusters and main fuel tanbk; or 4) a commanded TCM with large delta-V using LVA 660 N main engine and main fuel and oxidizer tanks. Thruster A1 Time 17 183 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 0 (A1) since START DATE and START TIME. Thruster A2 Time 18 193 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 1 (A2) since START DATE and START TIME. Thruster A3 Time 19 203 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 2 (A3) since START DATE and START TIME. Thruster A4 Time 20 213 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 3 (A4) since START DATE and START TIME. Thruster B1 Time 21 223 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 4 (B1) since START DATE and START TIME. Thruster B2 Time 22 233 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 5 (B2) since START DATE and START TIME. Thruster B3 Time 23 243 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 6 (B3) since START DATE and START TIME. Thruster B4 Time 24 253 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 7 (B4) since START DATE and START TIME. Thruster S1 Time 25 263 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 8 (S1) since START DATE and START TIME. Thruster S2 Time 26 273 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 9 (S2) since START DATE and START TIME. Thruster P1 Time 27 283 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 10 (P1) since START DATE and START TIME. Thruster P2 Time 28 293 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 11 (P2) since START DATE and START TIME. Thruster C1 Time 29 303 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 12 (C1) since START DATE and START TIME. Thruster C2 Time 30 313 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 13 (C2) since START DATE and START TIME. Thruster C3 Time 31 323 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 14 (C3) since START DATE and START TIME. Thruster C4 Time 32 333 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 15 (C4) since START DATE and START TIME. Thruster LVA Time 33 343 ASCII_Real 9 %9.2f second Cumulative ON time for thruster 16 (LVA) since START DATE and START TIME.