Product_Observational

Identification_Area

logical_identifier

urn:nasa:pds:mess-mag-raw:data-lhd:maglhd123610001

version_id

1.0

title

MESSENGER MAG Raw Housekeeping Header Data 2012-12-26 00:01:34 - 2012-12-26 23:54:54

information_model_version

1.15.0.0

product_class

Product_Observational

Citation_Information

author_list

Korth, H.

publication_year

2021

description

The table contains the instrument state (mode and health) as reported by the MAG Low-Rate Housekeeping (LRHK) packet. Each record in the table corresponds to the instrument state for a given LRHK packet. The table contains data from LRHK packets generated on a given day; data from each packet is stored as one row in the ASCII table. START_TIME and STOP_TIME correspond to the MET values of the first row and last row (respectively) in the table.

Modification_History

Modification_Detail

modification_date

2021-03-24

version_id

1.0

description

This product, MAGLHD123610001_V1.TAB, was originally released in 2015 as part of the PDS3 MESS-E/V/H/SW-MAG-2-EDR-RAWDATA-V1.0 dataset. The metadata have been migrated to PDS4. The data themselves are unchanged.

Observation_Area

Time_Coordinates

start_date_time

2012-12-26T00:01:34.000Z

stop_date_time

2012-12-26T23:54:54.000Z

Primary_Result_Summary

purpose

Engineering

processing_level

Raw

Investigation_Area

name

MESSENGER

type

Mission

Internal_Reference

lid_reference

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

reference_type

data_to_investigation

Observing_System

Observing_System_Component

name

MAGNETOMETER

type

Instrument

Internal_Reference

lid_reference

urn:nasa:pds:context:instrument:mag.mess

reference_type

is_instrument

Observing_System_Component

name

MESSENGER

type

Host

Internal_Reference

lid_reference

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

reference_type

is_instrument_host

Target_Identification

name

Mercury

type

Planet

Internal_Reference

lid_reference

urn:nasa:pds:context:target:planet.mercury

reference_type

data_to_target

Mission_Area

MESSENGER

mission_phase_name

Mercury Orbit Year 2

spacecraft_clock_start_count

1/264967560

spacecraft_clock_stop_count

1/265053560

Reference_List

Source_Product_External

external_source_product_identifier

MESS-E/V/H/SW-MAG-2-EDR-RAWDATA-V1.0:maglhd123610001

reference_type

data_to_raw_source_product

doi

10.17189/1519744

curating_facility

NASA Planetary Data System

description

This is the first version of this product converted to PDS4. The DOI provided references the PDS3 source data set.

File_Area_Observational

File

file_name

MAGLHD123610001_V1.TAB

creation_date_time

2012-12-27T19:54:46.000Z

file_size

13840

md5_checksum

0826ab80eb2160a4254ac0dba2c534b8

comment

This data file is unmodified from the PDS3 version.

Table_Character

offset

0

records

173

record_delimiter

Carriage-Return Line-Feed

Record_Character

fields

10

groups

0

record_length

80

Field_Character

name

MET

field_number

1

field_location

1

data_type

ASCII_Integer

field_length

12

unit

SECONDS

description

Mission elapsed time in seconds.

Field_Character

name

LR_OFFSET_TIME0

field_number

2

field_location

15

data_type

ASCII_Integer

field_length

4

description

The delta time offset from MET for the first low-rate data sample in the LRHK packet (in steps of 50 milliseconds). Provides 50 msec resolution.

Field_Character

name

MIN_INTERVAL

field_number

3

field_location

21

data_type

ASCII_Integer

field_length

4

description

The minimum derived sampling interval in seconds. Determined by taking the minimum time difference between successive timestamps in the LRHK packet.

Field_Character

name

MAX_INTERVAL

field_number

4

field_location

27

data_type

ASCII_Integer

field_length

4

description

The maximum derived sampling interval in seconds. Determined by taking the maximum time difference between successive timestamps in the LRHK packet.

Field_Character

name

NUM_LR_SAMPLES

field_number

5

field_location

33

data_type

ASCII_Integer

field_length

2

description

Number of low-rate sample data in the LRHK packet.

Field_Character

name

RNG_UP_TIME_DELAY

field_number

6

field_location

37

data_type

ASCII_Integer

field_length

4

description

Samples before increasing range.

Field_Character

name

RNG_DN_TIME_DELAY

field_number

7

field_location

43

data_type

ASCII_Integer

field_length

4

description

Samples before decreasing range.

Field_Character

name

MAG_DC_DC_CURR

field_number

8

field_location

49

data_type

ASCII_Real

field_length

8

description

The derived MAG DC/DC current; used following formula: if the DN (telemetry value) is less than 128: MAG_DC_DC_CURR = DN/64 else MAG_DC_DC_CURR = (DN-256)/64 The resulting value is in units of amperes.

Field_Character

name

PROBE_TEMP

field_number

9

field_location

59

data_type

ASCII_Real

field_length

9

description

The derived MAG probe temperature: PROBE_TEMP = 0.0123*(DN**2) - 0.7316*DN - 144.85. Value is in units of degrees Celsius.

Field_Character

name

MAG_ELEC_TEMP

field_number

10

field_location

70

data_type

ASCII_Real

field_length

9

description

The derived MAG electronics temperature: MAG_ELEC_TEMP = (155*DN/127) - 55 The value for this column is in units of degrees Celsius.