| CAID: MIPS-341 | Title: Ultimate Scattered Light Levels #2 | |
| System: MIPS | Principal: mrieke | Deputy: jkeene |
| Objective: | This is the 70um portion of the test. See MIPS-340 for more details. |
| Description: | Part 1: Diffuse light scattered into MIPS Point at a high sky backgrounfd region (preferably the Galactic Plane). Perform a thermal anneal on the 70-um array. Place the 70um-array into the first 70um dark position. Take 30 10-second integraqtions. Move the scan mirror to the other 70um dark position. Take 30 10-second integrations. Part 2: Use a star which will not saturate in a 3 second exposure -- flux < 2.5 Jy at 70um. Execute this test using both fine and default scales at 70um. Take two sets of 20 cycles per plate scale of the small field photometry AOR using 3 second exposures. Part 3: Scattered light from stars adjacent to the field of view. Repeat the following tests for a bright star which would saturate if viewed directly. Take 10-second integrations with the 70um array while stepping a star by 30" along the side of the array projected onto the sky. Take 6 exposures at each step position. Repeat for the other three sides of the array. |
| Day: 81.8569444444438 | Suggested Order: V700 | ||
| Must be preceded by these activities (list by CAID): MIPS-950H | |||
| Place in Schedule: Can begin after aperture door is opened, basic MIPS functionality is checked, and after the scattered background monitor is complete. | |||
| Priority: Desired | |||
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: | 2 arcsec (1 sigma radial) | ||
| Maximum precision offset uncertainty: | 1 arcsec (1 sigma radial) | ||
| Observatory configuration: | Point at Galactic Plane for Part 1, point at bright star for part 2 | ||
| Go/No Go criteria: | Scan mirror and array readouts must be functional | ||
Duration: 70 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 900 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): Can use the regular IER for measuring dark current. | |||
| List Analysis tools required (downlink): | |||
| Estimate of data turn around: 48 hours | |||
| Description: Will understand scattered light levels within MIPS. | |||
| Can proceed in parallel with other activity: No | |||
| Must outcome be confirmed before next activity: No | |||
| Method of Confirmation: data analysis | |||
| Success criteria: Obtained unsaturated data. | |||
| Contingency plan: If an unusually high background is observed, an analysis of the MIPS/CTA optical path will be needed. | |||
Comments | |||
| References: | |||
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Additional Comments:
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| This activity last updated: 7/2/2002 4:50:46 PM | |||