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Astronomical Applications Department, U.S. Naval Observatory - Data Flow Diagrams (Page 1)

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Astronomical Applications Department, U.S. Naval Observatory - Data Flow Diagrams
astrometric
data
FAME Data Reduction Overview:
Astrometric Pipeline
12 September, 2000
identify
targets
(urban?)
centroid
(monet)
spiral fitting
(murison?
olling?)
global fitting
(?)
sort by object
(?)
event
archive
centroid
archive
event
filter
select
events,
form spiral
batches
fiducial stars
spiral
parameters
archive
astrometric
fitting
(?)
astrometric
archive
science
distribution
bootstrap
fiducial star reductions
adjusted spiral
parameters
archive
- s/c rotation model
- optics parameters
- misalignments
- surface geometry
- instrument parameters
- focal plane alignment
- CCD orientations
program stars
(after fiducial star reductions)
process
Symbol Key:
data flow
data store
explanatory comment
additionally:
- fiducial star astrometric
parameters
- rigid spiral parameters (3
Euler angles each spiral)
program star
residuals
- fit centroid & PSF parameters
- in the fitting, use all events for
given star during same
observation episode
- magnitudes & spectral types
- CCD effects
- flag anomalies
- fit stars one by one
- 5 astrometric parameters
- use all observations of given star
- check PSFs and resiuals for
anomalies
- fit s/c rotation and orbit parameters
- integrate eqs. motion
- yields s/c rotation model for each spiral
- optimal spiral length TBD
- tie together observing spirals
- fid. star astrometric params
- spiral orientation params
- yields single s/c rotation model
- orient to ICRS
- s/c rotation
- identify object type
- check for anomalies
- calibrate raw pixel data
(effort organizer)

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