Sequencer Site SIRTF IOC Activity c. 2002

CAID: MIPS-242 Title: 160 um spectral leak check
 
System: MIPS Principal: mrieke Deputy: krs
Objective:   
To check the MIPS filters for short-wavelength
leaks
 
Description: 
Place a star 10 pixels = 150" away from the center
of the 160um array. Scan the mirror in small steps
(1/4 pixel) for total of 80 steps to obtain the !D
PSF. Repeat at a differnet S/C  offset for
redundancy and repeat using a much colder object
(eg., an asteroid).
 
Day:   53.2333333333372 Suggested Order:   K100
 
Must be preceded by these activities (list by CAID):   MIPS-324
 
Place in Schedule:   After dust cover is off.
 
Priority:   Critical

Conditions

Maximum telescope temperature: 6.5 K
 
Minimum telescope temperature: 5.5 K
 
Should activity be repeated if focus changes?   Yes     Repeat if focus changes by 0 mm
 
Maximum absolute pointing uncertainty: 10 arcsec (1 sigma radial)
 
Maximum precision offset uncertainty: 10 arcsec  (1 sigma radial)
 
Observatory configuration: pointing at a star
 
Go/No Go criteria: Scan mirror and array readout must be functional

Resources

Duration:   50 minutes
 
Real time downlink:   No   

Data Volume (uncompressed): 3 Mbits
 
List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): Specialized IET
 
List Analysis tools required (downlink):   Data analysis of the PSF power spectrum to derive the high frequency components of the PSF

Outcome

Estimate of data turn around:   48 hours
 
Description: Scans of the 1-D PSF at 160um taken with hot and cold sources
 
Can proceed in parallel with other activity: No
 
Must outcome be confirmed before next activity: No
 
Method of Confirmation:   Data analysis
 
 
Success criteria: Obtain well-exposed data
 
Contingency plan:  Repeat woth different star, modify integration time
 
 

Comments

 
References:  
 
Additional Comments:
Must be careful in choosing stars to advoid saturation and to avoid extended sources.
 
This activity last updated: 10/22/2001 3:17:02 PM