| IOC-MIPS_230a | 10470C | |||||||
| Title: | Effect of Bias Levels and Integration Times on Sensitivity | |||||||
| Objective: | To optimize instrument sensitivity. | |||||||
| Description: | A standard AOT will be executed at various bias levels and integration times to find the | |||||||
| optimum settings for in-orbit operation given the realities of cosmic-ray effects. | ||||||||
| This is not intended to determine the ultimate sensitivity of the instrument, but it should | ||||||||
| allow us to select a standard set of bias levels and integration times for routine observing. | ||||||||
| We should pick a standard star to observe with each array, which means that we'll have to | ||||||||
| optimize each array separately. With three arrays and perhaps 4 different bias | ||||||||
| levels, that implies 12 photometry AOTs. | ||||||||
| Place in Schedule: | The telescope must be cold enough to measure standard stars at 70 and 160 microns. | |||||||
| The photometry AOT must be checked out and working properly. | ||||||||
| Required Conditions: | The pointing accuracy and stability have to be enough to measure a standard star in a | |||||||
| short integration time - pointing of 10", stability of 0.6" in 3 seconds. | ||||||||
| Resources: | ||||||||
| duration (best estimate) | 85 minutes | |||||||
| real time downlink (Y / N) | n | |||||||
| special post event actions (Y / N) | data must be analyzed | |||||||
| Outcome: | ||||||||
| description | generates a series of SUR exposures | |||||||
| can proceed in parallel with other activity | no | |||||||
| must outcome be confirmed before next event / test /activity | no | |||||||
| method of confirmation (sensor TLM, data analysis, etc.) | analysis | |||||||
| estimate of data turn around if required for confirmation | ||||||||
| number of DCEs | 144 | |||||||
| Unique or included in planned uplink or downlink/analysis tool | should use planned AOTs | |||||||
| Contingency Plan: | ||||||||
| "What if..." | ||||||||
| IOC Critical | Y | |||||||
| References: | ||||||||
| Template last updated: | 11-Sep-95 | |||||||
| C. W. Engelbracht | ||||||||