Product_Observational

Identification_Area

logical_identifier

urn:nasa:pds:lro-crater:miscellaneous:mode-changes

version_id

1.9

title

Mode Changes

information_model_version

1.18.0.0

product_class

Product_Observational

Citation_Information

author_list

Spence, Harlan E.

publication_year

2026

description

MODE_CHANGES.TAB contains a listing of the changes in CRaTER operating mode and the times at which the changes occurred. See the INSTRUMENT_MODE description for an explanation of the various modes. Each element of the table records a single change of CRaTER operating mode.

Modification_History

Modification_Detail

modification_date

2026-06-14

version_id

1.9

description

Updated version of file.

Observation_Area

Time_Coordinates

start_date_time

2009-06-23T15:50:34.000Z

stop_date_time

2026-03-31T23:59:59.01Z

Primary_Result_Summary

purpose

Science

processing_level

Raw

Science_Facets

domain

Interstellar

domain

Heliosphere

discipline_name

Particles

facet1

Ions

facet2

Cosmic Ray

Investigation_Area

name

LRO

type

Mission

Internal_Reference

lid_reference

urn:nasa:pds:context:investigation:mission.lunar_reconnaissance_orbiter

reference_type

data_to_investigation

Observing_System

Observing_System_Component

name

Cosmic Ray Telescope for the Effects of Radiation

type

Instrument

Internal_Reference

lid_reference

urn:nasa:pds:context:instrument:lro.crat

reference_type

is_instrument

Observing_System_Component

name

LRO

type

Host

Internal_Reference

lid_reference

urn:nasa:pds:context:instrument_host:spacecraft.lro

reference_type

is_instrument_host

Target_Identification

name

Moon

type

Satellite

Internal_Reference

lid_reference

urn:nasa:pds:context:target:satellite.earth.moon

reference_type

data_to_target

Discipline_Area

Mission_Information

mission_phase_identifier

Fourth Extended Science Mission

spacecraft_clock_start

0267465034.68

spacecraft_clock_stop

0781452956.31

Particle_Observation

Particle_Parameter

particle_type

Ions

particle_measurement_type

Pulse Height Analysis

Particle_Parameter

particle_type

Ions

particle_measurement_type

Energy Spectra

Reference_List

Source_Product_External

external_source_product_identifier

LRO-L-CRAT-2-EDR-RAWDATA-V1.0

reference_type

data_to_calibrated_source_product

doi

10.17189/1519728

curating_facility

NASA Planetary Data System

description

This product was migrated from the PDS3 archive to PDS4. The DOI provided references the PDS3 source data set.

File_Area_Observational

File

file_name

MODE_CHANGES.TAB

creation_date_time

2026-02-12T03:45:01

file_size

70193

md5_checksum

5efbe8ce0b7cafeb973f670f7754b365

comment

This text file is unmodified from the PDS3 version.

Table_Character

offset

0

records

494

record_delimiter

Carriage-Return Line-Feed

Record_Character

fields

4

groups

0

record_length

139

Field_Character

name

INSTRUMENT_MODE

field_number

1

field_location

2

data_type

ASCII_String

field_length

12

description

The following instrument mode changes are reported: POWER_ON - instrument power up POWER_OFF - instrument power down POST_START - begin power-on start-up test (POST) POST_END - end power-on start-up test (POST) LLD_CHANGE - change baseline detector LLD setting LLDSWP_START - begin stand-alone LLD sweep test LLDSWP_STOP - end stand-alone LLD sweep test PULSER_START - begin stand-alone internal pulser sweep test PULSER_STOP - end stand-alone internal pulser sweep test ANOM_START - begin anomalous configuration or operation ANOM_STOP - end anomalous configuration or operation ELEV_START - begin elevated rate mode ELEV_STOP - end elevated rate mode EXTREM_START - begin extreme rate mode EXTREM_STOP - end extreme rate mode

Field_Character

name

TIME

field_number

2

field_location

17

data_type

ASCII_String

field_length

23

description

UTC time of mode change (YYYY-MM-DDTHH:MM:SS.SSS).

Field_Character

name

SPACECRAFT_CLOCK_COUNT

field_number

3

field_location

42

data_type

ASCII_String

field_length

13

description

LRO clock time of mode change (NNNNNNNNNN.NN).

Field_Character

name

COMMENT

field_number

4

field_location

57

data_type

ASCII_String

field_length

80

description

Details of the mode change.