| CAID: MIPS-247 | Title: 70 um stim response | |
| System: MIPS | Principal: jstansberry | Deputy: dfrayer |
| Objective: | Demonstrate that the MIPS Ge arrays respond to stimulators being turned on, and determine whether 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: | 6 sets of 31 3 second DCEs are taken, each set having Ge stim flashes every 5 DCEs (plus the first). In the first TWO sets of DCEs the CSMM is positioned at the zero-current position. In the first set the 70 and 160 Flood A stims are configured. In the second set the Flood B stims are configured. For the next two sets of DCEs the CSMM is placed at the 70um internal flat position. In the third set of DCEs the 70 Flat A stim is configured. In the fourth set the 70 Flat B stim is configured. For the next set of DCEs the 70 and 160 Flood A stims are configured using a DAC setting that will approximately halve the stim output compared to the nominal DAC setting. For the next set of DCEs the 70 and 160 Flood A stims are 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: 42.40625 | Suggested Order: G200 | ||
| Must be preceded by these activities (list by CAID): MIPS-322 | |||
| Place in Schedule: After aperture has been opened. | |||
| Priority: Critical | |||
Conditions | |||
| Maximum telescope temperature: | 12 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, instrument and telescope temperatures must be within range. | ||
Duration: 20 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 220 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): IER - identical to MIPS-248 | |||
| 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 can be detected. | |||
| Can proceed in parallel with other activity: Yes | |||
| 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 arrays. Output from 70 and 160 flood A stims is basically in agreement with the output ob | |||
| 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 70 and/or 160 microns. | |||
Comments | |||
| References: | |||
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Additional Comments:
This activity has been updated Current IER expansion file (~stansber/MIPS/IOC/mips_ier247.exp) uses 10sec DCEs. Telemetry indicates stims were activated, and light from the stims was unambiguously detected on the arrays. Possible failure modes are: Telemetry indicates any stim was not activated when it should have been. Light from any stim not detected. Stim detected, but telemetry indicates it was not active. Stim detected, but signal is significantly different than expected from ground test. | |||
| This activity last updated: 10/22/2002 7:52:31 PM | |||