MIPS-330 IOC Task Cookbook:
Total Power Skeleton AOT Validation

Principal: H. Dole
Deputy: J. Stansberry, C. Engelbracht, D. Frayer, S. Stolovy
Data Monkey(s):
Priority: Necessary
Downlink Priority: Normal
Analysis Time: 168
Last Updated: 15-Aug-2003

Objective

Check that the TPM mode works on a calibration source at 3 wavelengths with 3 exposure times .

Description

Execute MIPS TPM AOT for the three allowed integration times, 5 DCE of integration on the sky each, for each wavelength. The target field should include a point source of known brightness to check that the mode is working properly. Other tasks deal with extended source (MIPS-150) and assesment on the final sensitivity on low background (MIPS-270).

Data Collected

The AORs described here generate about 200 DCEs of interest (i.e., not including parallel data generated when another array is centered on the target). At 24µm, the 3, 10, and 30 second exposures will be used, while the 3 and 10 second exposures will be used for the Ge:Ga arrays.

#  Please edit this file with care to maintain the
#  correct format so that SPOT can still read it.
#  Generated by SPOT on:  8/15/2003     11:56:17

HEADER: FILE_VERSION=7.0, STATUS = PROPOSAL

      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM-skeleton-024-30s
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  HD039608
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=5h49m36.46s,  DEC_LAT=-60d40m34.6s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_24:  EXPOSURE_TIME = 30, N_CYCLES = 1
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=374.0, SLEW_TIME=0.0, SETTLE_TIME=0.0, SLEW_OVERHEAD=0.0, SPECIAL_OVERHEAD=0.0, UPLINK_VOLUME=0, DOWNLINK_VOLUME=0, VERSION=USER





      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM-skeleton-024-10s
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  HD039608
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=5h49m36.46s,  DEC_LAT=-60d40m34.6s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_24:  EXPOSURE_TIME = 10, N_CYCLES = 1
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=156.0, SLEW_TIME=0.0, SETTLE_TIME=0.0, SLEW_OVERHEAD=0.0, SPECIAL_OVERHEAD=0.0, UPLINK_VOLUME=0, DOWNLINK_VOLUME=0, VERSION=USER





      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM-skeleton-024-03s
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  HD159330
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=17h30m43.57s,  DEC_LAT=+57d52m36.6s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_24:  EXPOSURE_TIME = 3, N_CYCLES = 1
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=93.0, SLEW_TIME=0.0, SETTLE_TIME=0.0, SLEW_OVERHEAD=0.0, SPECIAL_OVERHEAD=0.0, UPLINK_VOLUME=0, DOWNLINK_VOLUME=0, VERSION=USER





      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM-skeleton-070-10s
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  HD050310
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=6h49m56.17s,  DEC_LAT=-50d36m52.4s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_70:  EXPOSURE_TIME = 10, N_CYCLES = 5
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=880.0, SLEW_TIME=0.0, SETTLE_TIME=0.0, SLEW_OVERHEAD=0.0, SPECIAL_OVERHEAD=0.0, UPLINK_VOLUME=0, DOWNLINK_VOLUME=0, VERSION=USER





      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM-skeleton-070-03s
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  HD050310
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=6h49m56.17s,  DEC_LAT=-50d36m52.4s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_70:  EXPOSURE_TIME = 3, N_CYCLES = 5
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=359.0, SLEW_TIME=0.0, SETTLE_TIME=0.0, SLEW_OVERHEAD=0.0, SPECIAL_OVERHEAD=0.0, UPLINK_VOLUME=0, DOWNLINK_VOLUME=0, VERSION=USER





      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM-skeleton-160-10s
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  HD131873
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=14h50m42.33s,  DEC_LAT=+74d09m19.8s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_160:  EXPOSURE_TIME = 10, N_CYCLES = 5
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=918.0, SLEW_TIME=0.0, SETTLE_TIME=0.0, SLEW_OVERHEAD=0.0, SPECIAL_OVERHEAD=0.0, UPLINK_VOLUME=0, DOWNLINK_VOLUME=0, VERSION=USER





      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM-skeleton-160-03s
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  HD131873
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=14h50m42.33s,  DEC_LAT=+74d09m19.8s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_160:  EXPOSURE_TIME = 3, N_CYCLES = 5
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=367.0, SLEW_TIME=0.0, SETTLE_TIME=0.0, SLEW_OVERHEAD=0.0, SPECIAL_OVERHEAD=0.0, UPLINK_VOLUME=0, DOWNLINK_VOLUME=0, VERSION=USER

Data Reformatting Requirements

Array Data Desired:

All Arrays

Data Reformatting Option:

• NONE
  1 FITS file per DCE per array.
• NORMAL
  1 FITS file per AOR per array.

Special Instructions:

Task Dependencies

Calibration Dependencies

• 24µm droop correction
• 24µm flat field
• Ge:Ga illumination corrections
• linearity correction, all arrays

Output and Deliverable Products

This will be our first assessment of the performance of the Total Power mode. We will be observing standard stars and so will be able to compare the calibration with that obtained in the photometry mode (they should be the same because the same optical train is used for both). The output will be a set of processed Total Power mode images and a report describing the performance of the mode. Specific questions to address are:

• How did the AOT perform?
  • Did the commands produce the expected data?
  • Are the data adequate for making a total power measurement?
  • Especially, are first stim, first frame, and latents effects potential problems ?
  • Is the pointing behavior as expected?
• How does the flux calibration compare to the photometry mode? (to be addressed in MIPS-150)
• What is the estimated sensitivity of this mode? (to be addressed in MIPS-270)

Data Analysis

The data will be processed with both the SSC pipeline and the MIPS DAT. The Total Power mode places great demands on the data processing system, and subtle problems with the data processing are likely to show up here. A careful comparison between the two processing methods will be made. Since multiple cycles of data are obtained on each array, the data can be used to look for systematic trends in the measurements that might betray uncorrected latent images or transient behavior.

Analysis will include:

• check repeatability on the sky during 5 cycles
• check repeatability of the stims the sky during 5 cycles
• give values for these repeatabilities, check for any trend and explain if the level is acceptable or not and why
• then check the effects of latents, first stim effect, ..
• give recommandations for 1) proceed or not with this AOT, and/or 2) give other strategies to modify this AOT.

Software Requirements

• SSC pipeline
• MIPS DAT
• IRAF and/or IDL

Actions Following Analysis

• Issue report
• Integrate any required changes to TP AOT into SSC uplink system
• Integrate any required changes into SSC pipeline and MIPS DAT
• give recommandations for 1) proceed or not with this AOT, and/or 2) give other strategies to modify this AOT.

Failure Modes and Responses

If this task fails altogether, it must be repeated to check out the AOT. If only part of it fails (e.g., more darks must be taken to ensure good Ge:Ga data, the Si:As stim is too faint, etc.), a smaller test that uses updated parameters will be generated and run.

Additional Notes