Sequencer Site SIRTF IOC Activity c. 2002

CAID: MIPS-240 Title: 24 um spectral leak check
 
System: MIPS Principal: mrieke Deputy: krs
Objective:   
To check the MIPS filters for short-wavelength
leaks
 
Description: 
Place a bright star in the FOV of the 24um array.
Scan the mirror in small steps (1/4 pixel) for a 
totalof 80 steps to obtain the 1D PSF.	
Repeat at different S/C offset for redundancy and
repeat using a much colder object (eg. an
asteroid)
 
Day:   42.4361111111139 Suggested Order:   G400
 
Must be preceded by these activities (list by CAID):   MIPS-121, MIPS-320
 
Place in Schedule:   After dust cover off
 
Priority:   Critical

Conditions

Maximum telescope temperature: 33 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 readouts must be functional.

Resources

Duration:   50 minutes
 
Real time downlink:   No   

Data Volume (uncompressed): 130 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

Outcome

Estimate of data turn around:   48 hours
 
Description: Scans of the 1-D PSF at 24um filter taken with cold and hot sources
 
Can proceed in parallel with other activity: No
 
Must outcome be confirmed before next activity: No
 
Method of Confirmation:   Data analysis
 
 
Success criteria: Obtained well-exposed data
 
Contingency plan:  Repeat with different star, modify integration time.
 
 

Comments

 
References:  
 
Additional Comments:
Must be careful in choosing stars as saturation must be avoided. Extended sources must also be avoided.
 
This activity last updated: 10/31/2001 2:17:38 PM