Transcript Mission Operations

CRaTER Data Products
&
Production Pipeline
Larry Kepko
Boston University Center for Space Physics
CRaTER PDR
Cosmic RAy Telescope for the Effects of Radiation
Calibration
o By exposing the detectors to beams of known
Current From Detector
energies, we can determine the response.
Energy of Incident Particle
Cosmic RAy Telescope for the Effects of Radiation
Calibration
o We will calibrate the detectors at 3 different beam
facilities, each with different energy ranges and
species.
•
Timetable TBD
o Spot-checking
Cosmic RAy Telescope for the Effects of Radiation
Calibration
o 88” Cyclotron, Lawrence Berkeley National Laboratory
Facility
LIIF
HIIF
Beam Properties
9-55 MeV
H
19 or 32.5 MeV/nucleon
He to Ne
4.5 MeV/nucleon
He to Bi
10 MeV/nucleon
B to Xe
14.5-16 MeV/nucleon
C to Xe
Cosmic RAy Telescope for the Effects of Radiation
Calibration
o NASA Space Radiation Laboratory at Brookhaven
National Laboratory
Facility
Beam Properties
Booster
up to 1 GeV
H
Booster
up to 1 GeV/nucleon
Fe
Cosmic RAy Telescope for the Effects of Radiation
Calibration
o Indiana University
Facility
IUCF
Beam Properties
30 - 200 MeV
Cosmic RAy Telescope for the Effects of Radiation
H
CRaTER Data Products
Description
Level 0
Unprocessed instrument data (pulse height at each detector),
secondary science (discarded events), housekeeping.
Level 1
Science data depacketed, 1-s resolution. Ancillary data pulled in
(spacecraft attitude, calibration files, etc)
Level 2
Pulse heights converted into energy deposited in each detector.
Calculation of Si LET spectra.
Level 3
Separate out magnetotail, foreshock and ‘GCR’ data.
Level 4
Calculation of TEP LET, incident energies and particle flux. Pull in
GCR data from other spacecraft (e.g. ACE).
Cosmic RAy Telescope for the Effects of Radiation
Level 0
LRO MOC
sFTP
CRaTER SOC
Primary/secondary
science
Housekeeping
PDS L0 Archive
Validation
To Level 1 Processing
Cosmic RAy Telescope for the Effects of Radiation
Level 0 Data Products
Unprocessed instrument data (pulse height at each detector),
Level 0 Science secondary science (discarded events, etc.). Up to 25 packets
of up to 48 events per second
Level 0
Bias voltage, temperature, etc., 16-s resolution
Housekeeping
Cosmic RAy Telescope for the Effects of Radiation
Level 1
Depacket, create
1-s data
LRO MOC
sFTP
Orbit & Attitude
CRaTER SOC
Calibration Files
PDS L1 Archive
To Level 2 Processing
Cosmic RAy Telescope for the Effects of Radiation
Level 1 Data Products
Unprocessed instrument data (pulse height at each detector),
Level 1 Science depacketed. Creation of 1-s data. Secondary science placed
in 1-s data header.
Level 1
Bias voltage, temperature, etc., 16-s resolution
Housekeeping
Cosmic RAy Telescope for the Effects of Radiation
Level 2
Convert to energy
deposited
Calculate Si LET
QL Plots
Events of Interest
PDS L2 Archive
To Level 3 Processing
Cosmic RAy Telescope for the Effects of Radiation
Level 2 Data Products
Level 2 Science Energy deposited in each detector and LET.
QL Plots
TBD
Events of
Interest
e.g., SEP events.
Cosmic RAy Telescope for the Effects of Radiation
Level 3
Region
Separation
Magnetotail
Foreshock
GCR
SEP Events
To Level 4 Processing
Cosmic RAy Telescope for the Effects of Radiation
Level 3 Data Products
L3 Region
Data separated into 3 files (or, alternately, 1 file with a data
flag) identifying what data was obtained while the moon was
in the a) magnetosphere, b) foreshock and c) pure GCR
L3 SEP
Data containing SEP events (definition TBD) are separated
as well
Cosmic RAy Telescope for the Effects of Radiation
Level 4
Calculate LET in
TEP
Modeling
Community
?
GCR Spectrum
Calculate Particle
Flux
Cosmic RAy Telescope for the Effects of Radiation
Timetables
o Level 2 data produced immediately upon verification of
Level 1 data.
•
Only involves application of pre-flight calibration curves and simple
LET calculations.
o GCR LET spectrum requires time
•
•
The longer the better
Probably something useful after 3-6 months
Cosmic RAy Telescope for the Effects of Radiation
Back-up Slides
Cosmic RAy Telescope for the Effects of Radiation
LET Calculation
Linear Energy Transfer
(LET) is the energy
deposition in matter per
unit length
Cosmic RAy Telescope for the Effects of Radiation
LET Calculation
LET in the Silicon
detectors can be
calculated directly
Cosmic RAy Telescope for the Effects of Radiation
LET Calculation
E0
LET in the TEP requires E0
and Ef
Ef
Cosmic RAy Telescope for the Effects of Radiation