Safe Mode Recovery Template Parameters
JWST's Safe Mode Recovery Template, available in the Astronomer’s Proposal Tool (APT), is used to recover a science instrument from a Safing event.
Purple text indicates the parameter is Limited Access.
Boldface italics type indicates the name of an APT parameter or a value for a parameter.
Red text indicates restrictions on a parameter.
Black text indicates an important note.
Brown text indicates notes for the developers.
Green text indicates the name of the parameter used by Commanding.
Items in brackets - <value> - are required values.
Items in square brackets - [<value>] - are optional.
The Safe Mode Recovery observation is used to recover a science instrument from a Safing event. The science instrument may be either powered off or on.
The special requirements BETWEEN, NO PARALLEL, REALTIME, REQUIRED, and SPECIAL COMMANDING SAFE MODE RECOVERY are automatically set and may be removed if not needed.
The following parameters are used to define Safe Mode Recovery observation. There are no exposures executed in this visit.
| Field | Details | Value | Notes |
|---|---|---|---|
| General Information | |||
| Observation Number | assign observation number | number | |
| Observation Label | provide observation label | text | |
| Observation Comments | provide observation comments | text | |
| Special Requirements | specify special requirements | choose from list | if needed |
| Template specific information | |||
| Science Instrument | select science instrument | choose from list | |
| FGS Guider | Select an FGS Guider | choose from list | if SCIENCE INSTRUMENT=FGS |
| Set Temperature Control | select whether to set temperature setpoint | YES, NO | if SCIENCE INSTRUMENT=NIRISS |
| Temperature Setpoint in Kelvin | if SET TEMPERATURE CONTROL=YES | ||
| Temperature Setpoint in Counts | if SCIENCE INSTRUMENT=NIRSPEC | ||
| Duration | specify duration | number | |
General Information
The following parameters are generic to all templates, and are not discussed in this article: Observation Number, Observation Label, Observation Comments, and Special Requirements.
Science Instrument
SCIENCE INSTRUMENT [INSTRUMENT] = FGS, MIRI, NIRCAM, NIRISS, NIRSPEC
Specify the science instrument that is being recovered from Safe.
FGS Guider
FGS Guider = GUIDER1, GUIDER2, BOTH
Select an FGS Guider.
This parameter is only available if SCIENCE INSTRUMENT = FGS.
Set Temperature Control
SET TEMPERATURE CONTROL= YES, NO (default)
Select Yes to set temperature control.
This parameter is only available if SCIENCE INSTRUMENT = NIRISS.
Temperature Setpoint in Kelvin
TEMPERATURE SETPOINT IN KELVIN
Enter the temperature setpoint in degrees Kelvin. Default is 38.05, range is 30.0 - 45.0. If SET TEMPERATURE CONTROL=NO this parameter is set to no value and is uneditable.
This parameter is only available if SCIENCE INSTRUMENT = NIRISS.
Temperature Setpoint in Counts
TEMPERATURE SETPOINT IN COUNTS
Enter the temperature setpoint in counts. Default is 20, range is integers from 0-31.
This parameter is only available if SCIENCE INSTRUMENT = NIRSPEC.
Duration
DURATION [DURATION]
Amount of time required, in integer seconds, for the visit to complete. A value is required.
Table 1. Default DURATION values for science instruments (in seconds)
| Instrument | Default | |
|---|---|---|
| FGS | 15 | when FGS GUIDER = FGS1 or FGS2 |
| FGS | 17 | when FGS GUIDER=BOTH |
| MIRI | 343 | |
| NIRCAM | 27 | |
| NIRISS | 21 | when SET TEMPERATURE CONTROL = NO |
| NIRISS | 1860 | when SET TEMPERATURE CONTROL = YES |
| NIRSPEC | 2076 |