urn:nasa:pds:mess_mla_calibrated:data_cdr:mlahadcdr0408200100_tab 1.0 1.10.1.0 Product_Observational 2018-06-04 1.0 PDS4 migrated product. 2004-08-20T01:00:00.617Z 2004-08-20T01:33:23.258Z Calibration Calibrated MESSENGER Mission urn:nasa:pds:context:investigation:mission.messenger data_to_investigation MESSENGER Spacecraft urn:nasa:pds:context:instrument_host:spacecraft.mess is_instrument_host Mercury Laser Altimeter Instrument urn:nasa:pds:context:instrument:mla.mess is_instrument Earth Planet urn:nasa:pds:context:target:planet.earth data_to_target Launch 1/001450833 1/001452835 mlahdiagnostic mlahwcdr 1.0 mlahadcdr0408200100.tab 2008-10-23T00:01:15Z 0 32044 This table contains one set of calibrated engineering data as reported by the MESSENGER Mercury Laser Altimeter (MLA) hardware diagnostic 'lite' packets. The hardware diagnostic 'full' packets are not used in flight. Additional details are contained in the CDR SIS document. Carriage-Return Line-Feed 90 0 480 et 1 1 ASCII_Real 16 second The independent variable of the equations of motion, in seconds from the J2000 epoch, at the shot timing origin T0. In the past this variable has been referred to at JPL as Ephemeris Time and at MIT, later at the Center for Astrophysics, as Coordinate Time. Its practical realization is the project-supplied clock kernel, applied to the Spacecraft Clock Mission Elapsed Time (MET) count that is transmitted to MESSENGER subsystems by the Integrated Electronics Module corresponding to the 1 PPS signal. The NAIF SPICE spacecraft clock (SCLK) kernel determines a corresponding Terrestrial Dynamic Time. These times are synchronous with respect to an observer at the Solar System barycenter in a relativistic sense. The SPICE library routine SCS2E performs the conversion to Ephemeris Time as used by the Project-supplied ephemeris files. utc 2 18 ASCII_String 24 Spacecraft clock (MET) converted to Coordinated Universal Time (UTC) using the project-supplied conversion from MET into Terrestrial Dynamical Time (TDT) seconds past the J2000 epoch, and by accounting for leap seconds and the offset between atomic time and UTC, into to an ISO standard calendar representation of UTC. met 3 43 ASCII_Integer 9 Spacecraft clock count, the Mission Elapsed Time in seconds, transmitted to subsystems by the Integrated Electronics Module, corresponding to the 1 PPS signal. shot_number 4 53 ASCII_Integer 1 Number of 8 Hz shot or minor frame, 0-7 subseconds 5 55 ASCII_Integer 5 Fraction of second from 1PPS to Packet Close, 0-65535 data_xfer_mode 6 61 ASCII_Integer 1 Science Data Transfer Mode. =0 byte, =1 nibble. test_pattern 7 63 ASCII_Integer 1 Test Pattern Selection, =1 LFSR, =2 AA, =3 55, =4 Counter, =5 Counter Inverse test_data_select 8 65 ASCII_Integer 1 Test data select. =0 Real data, =1 Test Data pattern. Defaults to 1. rate_select 9 67 ASCII_Integer 1 Rate select flag. =0 One Hz, =1 Six Hz, =2 Eight Hz, =3 Ten Hz. cycle_reset_tof 10 69 ASCII_Integer 1 Reset Time of Flight timing chips. With reset enabled the RMU will automatically reset the TOF after every RUPT until configured to do otherwise. cal_select 11 71 ASCII_Integer 1 Calibration mode selected. =0 0ns, =1 200ns, =2 400ns, =3 200ns. cal_enable 12 73 ASCII_Integer 1 Enable calibration. =0,1,2 Real Data. =3 TOF-A calibration data. clock_select 13 75 ASCII_Integer 1 Clock selected. =0 Internal(40%), =1 OSC_B (external clock), =2 OSC_A (external clock),=3 Internal(50%) synch_to_pps 14 77 ASCII_Integer 1 Synchronize the RMU to the 1PPS. =0 inhibited, =1 enabled cycle_slip 15 79 ASCII_Integer 1 CPU Cycle slip. (=0 no slip, =1 slip). ch1_noise_h1 16 81 ASCII_Integer 5 Background noise counter for channel 1 high ch1_noise_lo 17 87 ASCII_Integer 5 Background noise counter for channel 1 low ch2_noise 18 93 ASCII_Integer 5 Background noise counter for channel 2 ch3_noise 19 99 ASCII_Integer 5 Background noise counter for channel 3 laser_tx_threshold_aem 20 105 ASCII_Real 7 volt Laser start detector threshold (volts) detector_vga_gain 21 113 ASCII_Real 7 Detector VGA setting (pure number) det_ch1_hi_threshold_aem 22 121 ASCII_Real 7 volt AEM readback Ch. 1 high threshold setting (volts) det_ch1_lo_threshold_aem 23 129 ASCII_Real 7 volt AEM readback Ch. 1 low threshold setting (volts) det_ch2_threshold_aem 24 137 ASCII_Real 7 volt AEM readback Ch. 2 threshold setting (volts) det_ch3_threshold_aem 25 145 ASCII_Real 7 volt AEM readback Ch. 3 threshold setting (volts) start_pulse_pid 26 153 ASCII_Integer 1 Pulse ids for valid start pulse should be 0. start_pulse_begin_valid 27 155 ASCII_String 1 Validity bit of start pulse leading edge, =T if edge is valid, =F if invalid start_pulse_end_valid 28 157 ASCII_String 1 Validity bit of start pulse trailing edge, =T if edge is valid, =F if invalid start_pulse_begin_coarse 29 159 ASCII_Integer 5 RMU start pulse leading edge coarse counter, 200 ns ticks start_pulse_begin_fine 30 165 ASCII_Integer 3 RMU leading edge fine counter, ~400 ps ticks start_pulse_end_coarse 31 169 ASCII_Integer 5 RMU start pulse trailing edge coarse counter, 200 ns ticks start_pulse_end_fine 32 175 ASCII_Integer 3 RMU trailing edge fine counter, ~400 ps ticks ch1_hi_pulse_pid 33 179 ASCII_Integer 1 Pulse ids for Ch.1 high pulse are always 0. ch1_hi_pulse_begin_valid 34 181 ASCII_String 1 Validity bit of Ch.1 high pulse leading edge, =T if edge is valid, =F if invalid ch1_hi_pulse_end_valid 35 183 ASCII_String 1 Validity bit of Ch.1 high pulse trailing edge, =T if edge is valid, =F if invalid ch1_hi_pulse_begin_coarse 36 185 ASCII_Integer 5 RMU Ch.1 high pulse leading edge coarse counter, 200 ns ticks ch1_hi_pulse_begin_fine 37 191 ASCII_Integer 3 RMU Ch.1 high leading edge fine counter, ~400 ps ticks ch1_hi_pulse_end_coarse 38 195 ASCII_Integer 5 RMU Ch.1 high trailing edge coarse counter, 200 ns ticks ch1_hi_pulse_end_fine 39 201 ASCII_Integer 3 RMU Ch.1 high trailing edge fine counter, ~400 ps ticks lowpulse_1_begin_pid 40 205 ASCII_Integer 1 Identifies channel of low return 1 if valid. =1 Channel 1, =2 Channel 2, =4 Channel 3. lowpulse_1_begin_valid 41 207 ASCII_String 1 Validity bit for the leading edge of the low pulse 1; =T if pulse is valid, =F if invalid lowpulse_1_end_valid 42 209 ASCII_String 1 Validity bit for the trailing edge of the low pulse 1; =T if pulse is valid, =F if invalid lowpulse_1_begin_coarse 43 211 ASCII_Integer 5 RMU leading edge coarse counter, 200 ns ticks lowpulse_1_begin_fine 44 217 ASCII_Integer 3 RMU leading edge fine counter, ~400 ps ticks lowpulse_1_end_coarse 45 221 ASCII_Integer 5 RMU trailing edge coarse counter, 200 ns ticks lowpulse_1_end_fine 46 227 ASCII_Integer 3 RMU trailing edge fine counter, ~400 ps ticks lowpulse_2_begin_pid 47 231 ASCII_Integer 1 Identifies pulse channel of low return 2 if valid. =1 Channel 1, =2 Channel 2, =4 Channel 3. lowpulse_2_begin_valid 48 233 ASCII_String 1 Validity bit for the leading edge of the low pulse 2; =T if pulse is valid, =F if invalid lowpulse_2_end_valid 49 235 ASCII_String 1 Validity bit for the trailing edge of the low pulse 2; =T if pulse is valid, =F if invalid lowpulse_2_begin_coarse 50 237 ASCII_Integer 5 RMU leading edge coarse counter, 200 ns ticks lowpulse_2_begin_fine 51 243 ASCII_Integer 3 RMU leading edge fine counter, ~400 ps ticks lowpulse_2_end_coarse 52 247 ASCII_Integer 5 RMU trailing edge coarse counter, 200 ns ticks lowpulse_2_end_fine 53 253 ASCII_Integer 3 RMU trailing edge fine counter, ~400 ps ticks lowpulse_3_begin_pid 54 257 ASCII_Integer 1 Identifies pulse channel of low return 3 if valid. =1 Channel 1, =2 Channel 2, =4 Channel 3. lowpulse_3_begin_valid 55 259 ASCII_String 1 Validity bit for the leading edge of the low pulse 3; =T if pulse is valid, =F if invalid lowpulse_3_end_valid 56 261 ASCII_String 1 Validity bit for the trailing edge of the low pulse 3; =T if pulse is valid, =F if invalid lowpulse_3_begin_coarse 57 263 ASCII_Integer 5 RMU leading edge coarse counter, 200 ns ticks lowpulse_3_begin_fine 58 269 ASCII_Integer 3 RMU leading edge fine counter, ~400 ps ticks lowpulse_3_end_coarse 59 273 ASCII_Integer 5 RMU trailing edge coarse counter, 200 ns ticks lowpulse_3_end_fine 60 279 ASCII_Integer 3 RMU trailing edge fine counter, ~400 ps ticks range_gate_start 61 283 ASCII_Integer 5 Range Gate start time in units of 200 ns range_gate_stop 62 289 ASCII_Integer 5 Range Gate stop time in units of 200 ns. ch1_begin_event_count 63 295 ASCII_Integer 3 RMU pulse begin triggers on Ch. 1 ch1_end_event_count 64 299 ASCII_Integer 3 RMU pulse end triggers on Ch. 1 ch2_begin_event_count 65 303 ASCII_Integer 3 RMU pulse begin triggers on Ch. 2 ch2_end_event_count 66 307 ASCII_Integer 3 RMU pulse end triggers on Ch. 2 ch3_begin_event_count 67 311 ASCII_Integer 3 RMU pulse begin triggers on Ch. 3 ch3_end_event_count 68 315 ASCII_Integer 3 RMU pulse end triggers on Ch. 3 laser_tx_threshold 69 319 ASCII_Integer 3 Laser start detector threshold (counts) detector_gain 70 323 ASCII_Integer 3 Detector VGA setting (counts) det_ch1_hi_threshold 71 327 ASCII_Integer 3 AEM readback Ch. 0 threshold setting det_ch1_lo_threshold 72 331 ASCII_Integer 3 AEM readback Ch. 1 threshold setting det_ch2_threshold 73 335 ASCII_Integer 3 AEM readback Ch. 2 threshold setting det_ch3_threshold 74 339 ASCII_Integer 3 AEM readback Ch. 3 threshold setting tx_pulse_energy 75 343 ASCII_Integer 3 Laser pickoff transmit energy monitor laser_diode_cur 76 347 ASCII_Integer 3 Laser diode pump current laser_pulse_width 77 351 ASCII_Integer 3 Laser diode pulse width (counts) hz_to_rupt 78 355 ASCII_Integer 6 8 MHz Ticks from 1PPS signal to T_0 laser_energy 79 362 ASCII_Real 5 millijoule Laser pulse transmit energy start_time 80 368 ASCII_Real 12 nanosecond Transmit pulse leading edge time, from T_0. start_width 81 381 ASCII_Real 7 nanosecond Transmit pulse width, between leading and trailing edge. high_event 82 389 ASCII_Real 12 nanosecond High threshold event leading edge time, from T_0. high_width 83 402 ASCII_Real 7 nanosecond High threshold event pulse width, between leading and trailing edge. low_event1 84 410 ASCII_Real 12 nanosecond Low threshold event 1 leading edge time, from T_0. low_width1 85 423 ASCII_Real 7 nanosecond Low threshold event 1 pulse width, between leading and trailing edge. low_event2 86 431 ASCII_Real 12 nanosecond Low threshold event 2 leading edge time, from T_0. low_width2 87 444 ASCII_Real 7 nanosecond Low threshold event 2 pulse width, between leading and trailing edge. low_event3 88 452 ASCII_Real 12 nanosecond Low threshold event 3 leading edge time, from T_0. low_width3 89 465 ASCII_Real 7 nanosecond Low threshold event 3 pulse width, between leading and trailing edge. background_power 90 473 ASCII_Real 6 nanowatt Solar background power at 1064 nm within the detector field of view, averaged over the 8-Hz frame. CH1_NOISE_LO counts and DET_CH1_LO_THRESHOLD_AEM are the source of this measurement. The calibration of noise counts to power is preliminary. mlahadcdr0408200100.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed