| CAID: MIPS-251 | Title: Cosmic-ray limits on integration times for Ge:Ga MIPS arrays | |
| System: MIPS | Principal: alberto | Deputy: dfrayer |
| Objective: | To determine the maximum useful MIPS integration time in the presence of Cosmic-ray hits. |
| Description: | While illuminating the Ge:Ga detectors at a low level, take images at the different allowed integration times to evalute the trade off between "background limited" and "not completely swamped with particle hits, aka Cosmic Rays". Photometry AORs for 70 and 160um arrays at 3, 10 and 30sec [modified AOR] will be used. |
| Day: 0 | Suggested Order: P100 | ||
| Must be preceded by these activities (list by CAID): MIPS-245, MIPS-246, MIPS-250 | |||
| Place in Schedule: For 70um, the backgrd radiance muts be less than 1.e-12 W/cm2/sr (<12K). For 160um, the backgrd radiance must be less than 5.4e-13 W/cm2/sr (<6K). | |||
| Priority: Necessary | |||
Conditions | |||
| Maximum telescope temperature: | 6.5 K | ||
| Minimum telescope temperature: | 5.5 K | ||
| Should activity be repeated if focus changes? | No Repeat if focus changes by 0 mm | ||
| Maximum absolute pointing uncertainty: | 10 arcsec (1 sigma radial) | ||
| Maximum precision offset uncertainty: | 1 arcsec (1 sigma radial) | ||
| Observatory configuration: | standard | ||
| Go/No Go criteria: | solar activity at a reasonable level | ||
Duration: 45 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 115 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): Photometry AOR for 3 and 10sec, modified AOR for 30 secs. Special data analysis. | |||
| List Analysis tools required (downlink): Standard MIPS pipeline, image analysis package with statistical tools. | |||
| Estimate of data turn around: 168 hours | |||
| Description: SUR data for 70 and 160um arrays will be analyzed to determine the contribution to the noise from radhits. | |||
| Can proceed in parallel with other activity: No | |||
| Must outcome be confirmed before next activity: No | |||
| Method of Confirmation: Data analysis | |||
| Success criteria: Obtained data is downlinked and analyzed. Radhits are an unavoidable component of the space environment, so is good to understand as much as possible their effect on the arrays. We expect | |||
| Contingency plan: Aquired required data using the default integrations times. | |||
Comments | |||
| References: | |||
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Additional Comments:
see comments on task MIPS-250 | |||
| This activity last updated: 10/8/2002 9:50:24 AM | |||