Index

A

aberrations

differential velocity

optical

accuracy

summarized

ACQ-DIST

POS mode

TRANS mode

ACQ-MODE

POS mode

TRANS mode

alignment

minimizing effect of misalignment

angular diameter

non-point source

aperture

astrometer

designated

astrometry

pipeline

Position Mode

Transfer Mode

B

background

bright

measurements

noise

special, faint binary observation

subtraction, TRANS

beam decenter

S-curve

bibliography

special topics

binary star 1, 2, 3, 4, 5, 6

binary star studies

brightness

limits

C

calculation

exposure time, Position Mode

calibration

background subtraction, TRANS

color, POS 1, 2

cross-filter, POS

Cycle 7 monitoring

dark subtraction, TRANS

drift, POS

drift, TRANS

jitter, POS

jitter, TRANS

modes maintained by STScI

OFAD distortion, POS

pipeline, astrometry

plate overlay, POS

plate scale, POS

position centroid, POS

Position Mode

S-curve, TRANS

Transfer Mode

velocity, POS

centroid adjustment

Position Mode

check stars

CoarseTrack

target acquisition

Transfer Mode acquisition

color

lateral

Transfer Mode

combined mode

calibration

strategy, described

control

FGS

cosmic rays

COUNT

cross filter observation

D

dark

background

subtraction, TRANS

dark counts

FGS1R

decenter beam

FGS1R

designated astrometer

detector

description

diamter

measurement

differential velocity aberration

drift

astrometry pipeline 1, 2

calibration, POS

calibration, TRANS

exposure sequence

E

error sources

Position Mode

Transfer Mode

exposure

Position Mode

Transfer Mode

exposure sequence

drift

exposure time

calculation, Position Mode

Transfer Mode

extended source studies 1, 2, 3

F

faint binary

FES-TIME

POS mode

FGS

control

instrument overview

operating modes

science investigations suited to

web page

field

crowded, components

target

field dependence

S-curve 1, 2

field of view

position in pickel

filter

cross, calibration

spectral elements

filters

available 1, 2

fine bit error

star selector encoder

star selector encoder

fine bit error

FineLock

target acquisition

forward steering section

optical path

G

guide star

astrometry pipeline 1, 2

I

instrument

parameters

parameters, Phase II

interference

Koesters prism

interferometer

described

investigations

suitable for FGS

J

jitter

calibration, POS

calibration, TRANS

K

Koesters prism

described

L

lateral color

light path

see "optical path"

limits

brightness

target geometry

linked modes

see "combined mode"

LOCK

logsheet

proposal, examples

M

mass determination

misalignment

minimizing effect of

mixed mode

see "combined mode"

modes

bias, astrometry pipeline

described

motion

reflex

moving target 1, 2

N

NULL

O

operating modes

see "modes"

opmode

parameter, Phase Ii

optical aberrations

optical field angle distortion

calibration, POS

optical path

FGS

forward steering section

interferometer

optional parameter 1, 2

ACQ-DIST, POS mode

ACQ-DIST, TRANS mode

ACQ-MODE, POS mode

ACQ-MODE, TRANS mode

COUNT, POS mode

FESTIME, POS mode

LOCK, POS mode

NULL, POS mode

POS mode

SCANS, TRANS mode

STEP-SIZE

optional parameters

Phase II

ORIENT

orientation

target

overheads

Position Mode

Transfer Mode

P

parallax 1, 2

parameters

instrument, Phase II

optional, Phase II

Phase II

logsheet examples

proposal, preparing

photometry

Position Mode

relative

photomultiplier tube

described

PMT calibration, TRANS

pickel

described

pipeline

drift correction 1, 2

epoch level

exposure level

mode bias

Position Mode 1, 2

processing

Transfer Mode

visit level

plate overlay

calibration, POS

plate scale

calibration, POS

POS TARG

Position mode

described

Position Mode

astrometry

astrometry pipeline

bibliography

calibration

centroid adjustment

combined with Transfer

exposure

exposure time

observation planning

overheads

photometry

pipeline

pupil

proper motion 1, 2

proposal

logsheet examples

Phase II

pupil

Position Mode

R

reference stars

references

special topics

reflex motion

roll angle

faint binary observation

S

SAME POS

scan length

Transfer Mode 1, 2

SCANS

scattered light

science

investigations suited to FGS

S-curve

beam decenter

calibration, TRANS

field dependence

ideal

properties

wavelength dependence, TRANS

search

target acquisition

SEQ NON-INT

slewing

described 1, 2

South Atlantic Anomaly

special requirement

exposure-level

orient

POS TARG

SAME POS

SEQ NON-INT

timing

visit-level

special requirements

Phase II

spectral coverage

spectral element

parameter, Phase II

star selector

described

stellar mass

step-size

STEP-SIZE

T

target acquisition

CoarseTrack

FineLock

Transfer Mode

target selection

Transfer Mode

timing requirement

Transfer mode

described

Transfer Mode

astrometry

bibliography 1, 2

calibration

color

combined with Position

exposure

exposure time

overheads

pipeline

S-curve

target acquisition

V

velocity

differential, aberration

virtual plate

W

WalkDown

target acquisition, FineLock

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FGS page 1, 2