| CAID: MIPS-248 | Title: 160 um stim response | |
| System: MIPS | Principal: jstansberry | Deputy: dfrayer |
| Objective: | Demonstrate that the MIPS Ge arrays respond to stimulators being turned on, and determine that all the stims work. Also, verify that the output of the stims is approximately what it was on the ground by operating the primary stimulators at 3 different DAC settings. |
| Description: | 4 sets of 31 3 second DCEs are taken, each set having Ge stim flashes every 5 DCEs (plus the first). The CSMM is positioned at the zero-current position. In the first set the 160 Flood A stim is configured. In the second set the Flood B stim is configured. In the third set the 160 Flood A stim is configured using a DAC setting that will approximately halve the stim output compared to he nominal DAC setting. For the next set of DCEs the160 Flood A stim is configured using a DAC setting that will approximately quarter the stim output compared to the nominal DAC setting. Housekeeping data regarding the stimulator voltages/current for all sets of DCEs should be monitored. |
| Day: 48.4694444444467 | Suggested Order: H200 | ||
| Must be preceded by these activities (list by CAID): MIPS-324 | |||
| Place in Schedule: After aperture has been opened | |||
| Priority: Critical | |||
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: | 100 arcsec (1 sigma radial) | ||
| Maximum precision offset uncertainty: | 100 arcsec (1 sigma radial) | ||
| Observatory configuration: | standard | ||
| Go/No Go criteria: | CSMM, CE, and detectors must be operational, instrume telescope temperatures must be w/in range. | ||
Duration: 10 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 110 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): IER | |||
| List Analysis tools required (downlink): Pipeline and/or UofA DAT output. UofA data visualizer (xsloper_view). Need housekeeping data re. stims. | |||
| Estimate of data turn around: 2 hours | |||
| Description: Confirmation that stimulators were detected | |||
| Can proceed in parallel with other activity: No | |||
| Must outcome be confirmed before next activity: No | |||
| Method of Confirmation: Data analysis and sensor TLM confirms that stims were commanded on and that light from the stims was detected in all cases. | |||
| Success criteria: Telemetry indicates stims were activated, and light from the stims was unambiguously detected on the relevant array. Output from 160 flood A stim is basically in agreement with the output observ | |||
| Contingency plan: Verify agreement between telemetry and signal on array. If stim was 'on' and no light was detected flag that stim as inoperative. If light was detected and telemetry indicates a failure, track telemetry error. If stim brightness is anomalous, activity may need to be repeated w/ different stim voltage, and the flux response linearity activities (MIPS-315, MIPS-400, dhines principle) will need to be updated, as will AOT validations at 160 microns. | |||
Comments | |||
| References: | |||
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Additional Comments:
This activity could be done using 3sec DCEs. Current expansion file (~stansber/MIPS/IOC/mips_ier248.exp) uses 10sec DCEs. Telescope temperature for this test could be higher, possibly as high as 9K, and still allow the aliveness of the stims to be verified. | |||
| This activity last updated: 7/2/2002 3:30:56 PM | |||