urn:nasa:pds:dawn-grand-vesta:data_calibrated:grd-l1b-120728-120809_140930-vtc-bgoc
1.0
GRD-L1B-120728-120809_140930-VTC-BGOC
1.11.0.0
Product_Observational
Prettyman, T. H.
2020
GRaND level 1a BGO calibrated histograms
2020-12-08
1.0
PDS4 migration of GRD-L1B-120728-120809_140930-VTC-BGOC.TAB from PDS3 dataset DAWN-A-GRAND-3-RDR-VESTA-COUNTS-V1.0
2012-07-28T23:59:04Z
2012-08-09T01:34:33Z
Science
Calibrated
DAWN MISSION TO VESTA AND CERES
Mission
urn:nasa:pds:context:investigation:mission.dawn_mission_to_vesta_and_ceres
data_to_investigation
Dawn Spacecraft + GRaND
DAWN
Spacecraft
urn:nasa:pds:context:instrument_host:spacecraft.dawn
is_instrument_host
GAMMA-RAY AND NEUTRON DETECTOR
Instrument
urn:nasa:pds:context:instrument:dawn.grand
is_instrument
(4) Vesta
Asteroid
urn:nasa:pds:context:target:asteroid.4_vesta
data_to_target
VESTA TRANSFER TO CERES
VTC
0396792117.000
0397748247.000
naif0010.tls
dawn_203_sclkscet_00039.tsc
table
processing_information_to_data_object
GRD_L1B_PIPELINE
Version 1.0
urn:nasa:pds:dawn-grand-ancillary:miscellaneous:grd_state_table
nucspec_product_to_state_table
table
state_table_to_data_table
15
SCLK
396792117
397181037
SEP
true
SEP
396792117
397181037
false
397181247
397748247
Solar Flare
false
396792117
397748247
Gamma-ray Burst
false
396792117
397748247
Data Glitch
false
396792117
397748247
table
grand_parameters_to_table
396792117
397181037
210
396792117
397181037
35
urn:nasa:pds:dawn-grand-ancillary:document:dawn_grand_bgo_calibrated_data_processing.pdf
data_to_document
Dawn's gamma ray and neutron detector: BGO data processing
GRD-L1B-120728-120809_140930-VTC-BGOC.TAB
2014-09-30T20:19:27Z
4554
f86b49c622ded4d2da5448c404227324
table
0
4554
This data file contains a time series of corrected and calibrated pulse
height spectra measured by GRaND's bismuth germanate (BGO) scintillator
during Vesta encounter. Each row contains the spacecraft clock (SCLK) ticks
and spacecraft event UTC time (SCET_UTC) corresponding to the end of the
science accumulation interval (accurate to 1s). The ephemeris time for the
midpoint of the science interval is also included. Each row also contains
the corresponding 1024-channel BGO spectrum accumulated. Each spectrum has
been subjected to the following corrections:
- Removal of analog-to-digital (ADC) differential nonlinearity artifacts
- Gain and offset correction to put each spectrum on the same pulse height
For each channel, the corresponding mid-point pulse height can be determined
by multiplying channel index (0-1023) by 8.9 keV/channel.
The processing steps, including criteria for including spectra in the time
series, are described by Yamashita and Prettyman, ''Dawn's Gamma Ray and
Neutron Detector: BGO Data Processing,'' which can be found in in the
document collection of this bundle.
Carriage-Return Line-Feed
3
1
6188
SCLK
1
1
ASCII_Integer
10
%10d
Seconds
SCLK ticks at the end of the science accumulation interval (s) Each
science data record has a unique SCLK value, which can be used as an
identifier.
SCET_UTC
2
11
ASCII_Date_Time_YMD
20
%20s
UTC S/C event time (SCET) at the midpoint of the science accumulation
interval.
ET_MID
3
31
ASCII_Real
12
%12.1f
Seconds
Ephemeris time at the midpoint of the science accumulation interval (s).
BGOC
1
1024
1
0
1024-channel, calibrated BGO spectrum. The pulse height of each channel
I=0,1023 is given by 8.9 x I with units of keV.
43
6144
BGOC_element
1
ASCII_Integer
6
%6d
Counts