! File: 2165C.PROP
! Database: PEPDB
! Date: 17-FEB-1994:02:15:35
coverpage:
title_1: GHRS MOVING TARGET ACQUISITION AND TRACKING
proposal_for: SV/HRS
pi_fname: DENNIS
pi_mi: C
pi_lname: EBBETS
pi_inst: BALL AEROSPACE SYSTEMS GROUP
pi_country: USA
pi_phone: 303-939-5964
keywords_1: GHRS,SCIENCE VERIFICATION,TARGET ACQUISITION
keywords_2: CALIBRATION
hours_pri: 1.80
num_pri: 1
wf_pc: Y
hrs: Y
time_crit: Y
! end of coverpage
abstract:
line_1: This test was rewritten April 28, 1989 for the SV Scrub
line_2: Plan, after consultation with Hal Weaver.
line_4: The goal of this test is to develop and verify the ability to acquire and
line_5: track rapidly moving solar system objects such as comets and
line_6: asteriods. There are two procedures identified, a WFC Int
line_7: Acq, and an FOS Acq/Firmware. We also make GHRS Images in both
line_8: undispersed UV light with N2, and the light of CS emission at
line_9: 2576A. This may be useful for Dispersed Light Target Acq.
line_10: if sufficiently bright and concentrated near the nucleus.
!
! end of abstract
general_form_proposers:
lname: TRAFTON
fname: L.
mi: M.
inst: UNIV OF TEXAS
country: USA
!
lname: BRANDT
fname: J.
mi: C.
inst: LASP/UNIV OF COLORADO
country: USA
!
lname: EBBETS
fname: DENNIS
mi: C.
inst: BALL AEROSPACE SYSTEMS
country: USA
!
lname: WEAVER
fname: HAL
inst: SPACE TELESCOPE SCIENCE INSTITUTE
country: USA
!
! end of general_form_proposers block
general_form_text:
question: 2
section: 1
line_1: Comets will be important scientific targets for the GHRS during
line_2: the GTO and GO phases. Four problems will complicate observations
line_3: when they are nearest the Earth. (1) The ephemeris may not be
line_4: known precisely enough when proposals are written to predict the
line_5: location at observation time to better than a few arc seconds.
line_6: (2) The rate of motion across the sky may make it difficult or
line_7: impossible to perform a WFC assisted acquisition using common
line_8: quide stars. (3) It may be difficult to track in FGS Fine Track
line_9: Lock for the required exposure time. (4) The extended appearance
line_10: will complicate on board Mode II target acquisition using current
line_11: (9/87) GHRS flight software. The observations proposed here
line_12: describe a plausible approach to overcome the first three issues.
!
question: 3
section: 1
line_1: 1. Interactive Acquisition with WFC (and/or GHRS)
line_2: a. WFC V image (F569W) to identify target
line_3: b. WFC UV image (F284W)
line_4: c. offset to GHRS 2.0 aperture
line_5: c. GHRS map and measure flux with Mirror N2
line_6: guide on gyros along approximate path
line_7: d. GHRS Image Mode observation at 2576A light of CS
line_8: e. GHRS Accum Mode spectrum at 2576A.
line_9: f. return to WFC and repeat image to judge guiding accuracy
line_11: 2. FOS assisted on-board acquisition
line_12: a. Acq/Firmware acquisition
line_13: b. offset to WFC t a particular pixel
line_14: c. WFC image to judge accuracy of FOS acquisition
!
question: 5
section: 1
line_1:
line_3: Test should be performed when the target is moving with a porper
line_4: motion in the range 0.01 to 0.1 "/sec.
line_6: Real time analysis is needed to process the WFC images as Interactive
line_7: Acquisitions.
line_10: The ability to track and guide accurately for approximately 45
line_11: minutes is the main purpose of the test.
line_13: Gyro control will be used while tracking comet.
line_15: SV Minimum Plan: All
line_16: SV Delta Plan: None
line_17: Guiding tolerance 0.20 arc seconds
line_19: SV PREREQUISITES:
line_20: FOS Mode II Target Acquisition - 2195
line_21: GHRS Mode II Target Acquisition - 1352
line_22: GHRS WF/PC Assisted Target Acquisition - 1400
line_23: OV Moving Target OLT - 2183
!
question: 7
section: 1
line_1: Cross-calibrate WFC and GHRS acquisition mirror count rates.
line_3: Use location of target in field maps to estimate accuracy of
line_4: tracking on gyros for ten minutes at a time.
!
question: 10
section: 1
line_1: Data analysis facilities
line_2: Test personnel
line_3: Travel and publication support
!
!end of general form text
general_form_address:
lname: EBBETS
fname: D.
mi: C.
category: PI
inst: BALL AEROSPACE
addr_1: PO BOX 1062
addr_2: FT-3
city: BOULDER
state: CO
zip: 80306
country: USA
phone: (303)939-5964
!
lname: WEAVER
fname: HAROLD
mi: A.
inst: SPACE TELESCOPE SCIENCE INSTITUTE
addr_1: 3700 SAN MARTIN DRIVE
city: BALTIMORE
state: MD
zip: 21218
country: USA
phone: 301-338-4765
!
! end of general_form_address records
! No fixed target records found
solar_system_targets:
targnum: 1
name_1: WILD
descr_1: COMET WILD 2
lev1_1: STD = WILD 2
comment_1: USER AFTER LATE NOVEMBER,1990
comment_2: THROUGH EARLY 1991.
!
targnum: 2
name_1: SWIFT
descr_1: COMET SWIFT-GEHREL
lev1_1: STD = SWIFT-GEHREL
comment_1: USE FROM MID-OCT 1990 TO LATE DEC
comment_2: 1990.
!
! end of solar system targets
! No generic target records found
exposure_logsheet:
linenum: 1.000
sequence_1: DEF
sequence_2: COMET1
targname: #
config: WFC
opmode: IMAGE
aperture: W1
sp_element: F569W
num_exp: 1
time_per_exp: 0.2S
s_to_n: 100
fluxnum_1: 1
priority: 1
req_1: INT ACQ FOR 2-5;
req_2: SEQ 1-6;
req_3: GUID TOL 0.20"/1-6;
req_4: CYCLE 0 / 1-31;
comment_1: BLIND POINT TO COMET
comment_2: WHILE TRACKING COMET
comment_3: UNDER GYRO CONTROL.
!
linenum: 2.000
sequence_1: ^
sequence_2: ^
targname: ^
config: ^
opmode: ^
aperture: ^
sp_element: F284W
num_exp: 1
time_per_exp: 2M
s_to_n: 80
fluxnum_1: 1
priority: 1
!
linenum: 3.000
sequence_1: ^
sequence_2: ^
targname: ^
config: HRS
opmode: ACQ
aperture: 2.0
sp_element: MIRROR-N2
num_exp: 1
time_per_exp: 265S
s_to_n: 10
fluxnum_1: 1
priority: 1
param_1: MAP=END-POINT,
param_3: SEARCH-SIZE=1,
param_4: LOCATE=NO,
param_5: FAINT=10,
req_1: ONBOARD ACQ FOR 4,5;
comment_1: STEP-TIME=1
!
linenum: 4.000
sequence_1: ^
sequence_2: ^
targname: ^
config: ^
opmode: IMAGE
aperture: ^
sp_element: G270M
num_exp: 1
time_per_exp: 968S
s_to_n: 10
fluxnum_1: 1
priority: 1
param_1: CARPOS=9792,
param_2: X=2035,
param_3: Y=2781,
comment_1: STEP-TIME=2
!
linenum: 5.000
sequence_1: ^
sequence_2: ^
targname: ^
config: ^
opmode: ACCUM
aperture: ^
sp_element: G270M
wavelength: 2576
num_exp: 1
time_per_exp: 4M
s_to_n: 20
fluxnum_1: ^
priority: ^
param_1: STEP-PATT=3,
param_2: COMB=FOUR,
param_3: DOPPLER=DEF,
param_4: STEP-TIME=0.2,
!
linenum: 6.000
sequence_1: ^
sequence_2: ^
targname: ^
config: WFC
opmode: IMAGE
aperture: W1
sp_element: F569W
num_exp: 1
time_per_exp: 0.2S
s_to_n: 100
fluxnum_1: 1
priority: 1
comment_1: BLIND POINT TO COMET
comment_2: WHILE TRACKING COMET UNDER
comment_3: UNDER GYRO CONTROL.
!
linenum: 10.000
sequence_1: DEF
sequence_2: COMET2
targname: #
config: FOS/RD
opmode: ACQ/FIRMWARE
aperture: 4.3
sp_element: MIRROR
num_exp: 1
time_per_exp: 1M
s_to_n: 10
fluxnum_1: 1
priority: 1
req_1: ONBOARD ACQ FOR 11,12;
req_2: SEQ 10-12;
comment_1: EXPOSURE TIMES UNCERTAIN FOR FOS OBS
comment_2: OFFSET TO WFC AFTER FOS ACQUISITION
!
linenum: 11.000
sequence_1: ^
sequence_2: ^
targname: ^
config: WFC
opmode: IMAGE
aperture: W1
sp_element: F569W
num_exp: 1
time_per_exp: 0.2S
s_to_n: 100
fluxnum_1: 1
priority: 1
!
linenum: 12.000
sequence_1: ^
sequence_2: ^
targname: ^
config: ^
opmode: ^
aperture: ^
sp_element: F284W
num_exp: ^
time_per_exp: 2.0M
s_to_n: 80
fluxnum_1: ^
priority: ^
!
linenum: 20.000
sequence_1: USE COMET1
targname: WILD
req_1: SELECT 1 OF 20-21 OR 30-31;
req_2: COND IF TARGETS ARE AVAILABLE;
!
linenum: 21.000
sequence_1: USE COMET2
targname: WILD
req_1: COND IF TARGETS ARE AVAILABLE;
!
linenum: 30.000
sequence_1: USE COMET1
targname: SWIFT
req_1: COND IF TARGETS ARE AVAILABLE;
!
linenum: 31.000
sequence_1: USE COMET2
targname: SWIFT
req_1: COND IF TARGETS ARE AVAILABLE;
!
! end of exposure logsheet
! No scan data records found