MIPS-270 IOC Task Cookbook:
Total Power Measurement at Ecliptic Pole

Principal: H. Dole
Deputy: Stansberry, Engelbracht, Shupe, Frayer, Stolovy, Rieke
Data Monkey(s):
Priority:
Downlink Priority: Normal
Analysis Time:
Last Updated: 14-Aug-2003
Cookbook Quick Navigation
Objective Description Data Data
Reformatting		 Dependencies Calibration
Dependencies
Outputs Analysis Software Actions Failure Additional

Objective

Check the final sensitivity of TPM mode on extended low background, on the NEP

Description

Perform TPM at 24, 70 and 160 microns (using only one exposure time for a given wavelength) on a dark extended background to assess the final sensitivity that might be reached in this mode (especially at 160) and check the level of diffuse light at 160.

Data Collected

50s total integration with 10s DCE at each wavelength around the NEP, 50s at 24 and 70 for Ecliptic leading and trailing.

Reminder of TPM AOT
1 AOT cycle at 24 corresponds to 50s integration in the sky, and takes 156s
1 AOT cycle at 70 corresponds to 10s integration in the sky, and takes 176s
1 AOT cycle at 160 corresponds to 10s integration in the sky, and takes 176s
So if you want 50s integration on the sky at 24, 70 and 160, you have to use 1 cycle at 24, 5 cycles at 70 and 5 cycles at 160, total: 1954s (+slew tax 180s).
If you want 50s integration on the sky at 24 and 70, you have to use 1 cycle at 24, and 5 cycles at 70, total: 1036s (+slew tax 180s).

In summary, execution time: NEP: 1954s Zodi: 2x156s TOTAL: 2266s=37.7min

Targets:
- NEP
- Zodi leading
- Zodi trailing 


#  Please edit this file with care to maintain the
#  correct format so that SPOT can still read it.
#  Generated by SPOT on:  8/14/2003     11:6:4

HEADER: FILE_VERSION=7.0, STATUS = PROPOSAL

      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TSun90Lat0_IOC
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  TPMEclipticLeading
  COORD_SYSTEM:  Ecliptic  J2000
      POSITION:  RA_LON=326.20000d,  DEC_LAT=+0.00000d
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
TIMING1:  START_DATE=2003 Nov 18, START_TIME=00:00:00, END_DATE=2003 Nov 20, END_TIME=00:00:00






      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  LSun90Lat0_IOC
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  TPMEclipticTrailing
  COORD_SYSTEM:  Ecliptic  J2000
      POSITION:  RA_LON=146.20000d,  DEC_LAT=+0.00000d
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
TIMING1:  START_DATE=2003 Nov 18, START_TIME=00:00:00, END_DATE=2003 Nov 20, END_TIME=00:00:00






      AOT_TYPE:  MIPS Total Power
     AOR_LABEL:  TPM_NEP
    AOR_STATUS:  new

 MOVING_TARGET:  NO
   TARGET_TYPE:  FIXED SINGLE
   TARGET_NAME:  TPM_NEP
  COORD_SYSTEM:  Equatorial  J2000
      POSITION:  RA_LON=18h00m00.00s,  DEC_LAT=+66d00m00.0s
OBJECT_AVOIDANCE:  EARTH = YES, OTHERS = YES

    MICRON_24:  EXPOSURE_TIME = 10, N_CYCLES = 1
    MICRON_70:  EXPOSURE_TIME = 10, N_CYCLES = 5
    MICRON_160:  EXPOSURE_TIME = 10, N_CYCLES = 5
SPECIAL: IMPACT = none, LATE_EPHEMERIS = NO,SECOND_LOOK = NO
RESOURCE_EST: TOTAL_DURATION=1954.0, 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:

Special Instructions:

Task Dependencies

Calibration Dependencies

Output and Deliverable Products

TPM at 24, 70 and 160 microns.
Minimum deliverable: one value and uncertainty for the sky brightness at 24, 70 and 160.
if possible: one fully calibrated TPM map at 24, 70 and 160.

Data Analysis

Check the noise: latency effects, first stim, .. and correct for them.
Derive an accurate and calibrated map at each wavelength.
Estimate properly the noise level.
Give the value of the background brightness and its uncertainty at 24, 70 and 160.
Compare with COBE/IRAS schelgelized/SPOT estimates
Each pixel will be used independently to create a map. But averaging pixels of part of the array may be an alternative as well.
Check that the mode is working at 160: is it dark enough ?

Software Requirements

Actions Following Analysis

At each wavelength:
Understand the noise properties and limitations.
Give the reached noise level.
Give the sky brightness and uncertainty.
Compare with COBE measurements.
Assess the AOT mode at 160 (using also MIPS-170 and MIPS-150).

Failure Modes and Responses

70 and 160 data are mandatory. If it fails, do it again. If it fails at 24, check if parralel mode data can be used.

Additional Notes