pynrc.DetectorOps¶

Class to hold detector operations information. Includes SCA attributes such as detector names and IDs as well as multiaccum class for ramp settings.

Parameters

detector (int, str) – NIRCam detector ID (481-490) or SCA ID (A1-B5).
wind_mode (str) – Window mode type ‘FULL’, ‘STRIPE’, ‘WINDOW’.
xpix (int) – Size of window in x-pixels for frame time calculation.
ypix (int) – Size of window in y-pixels for frame time calculation.
x0 (int) – Lower-left x-coord position of detector window.
y0 (int) – Lower-left y-coord position of detector window.
nff (int) – Number of fast row resets.

keyword read_mode

NIRCam Ramp Readout mode such as ‘RAPID’, ‘BRIGHT1’, etc.

kwtype read_mode

str

keyword nint

Number of integrations (ramps).

kwtype nint

int

keyword ngroup

Number of groups in a integration.

kwtype ngroup

int

keyword nf

Number of frames per group.

kwtype nf

int

keyword nd1

Number of drop frame after reset (before first group read).

kwtype nd1

int

keyword nd2

Number of drop frames within a group (ie., groupgap).

kwtype nd2

int

keyword nd3

Number of drop frames after final read frame in ramp.

kwtype nd3

int

Examples

Use kwargs functionality to pass keywords to the multiaccum class.

Send via a dictionary of keywords and values:

>>> kwargs = {'read_mode':'RAPID', 'nint':5, 'ngroup':10}
>>> d = DetectorOps(**kwargs)

Set the keywords directly:

>>> d = DetectorOps(read_mode='RAPID', nint=5, ngroup=10)

Module Attributes

`channel`	Detector channel 'SW' or 'LW' (inferred from detector ID)
`chsize`	Size of Amplifier Channel
`detid`	Selected Detector ID from detectors in the detid_list attribute.
`detid_list`	Allowed Detector IDs
`detname`	Selected Detector ID from detectors in the scaid_list attribute.
`fastaxis`	Fast readout direction in sci coords
`mask_act`	Active pixel mask for det coordinates
`mask_channels`	Channel masks for det coordinates
`mask_ref`	Reference pixel mask for det coordinates
`module`	NIRCam modules A or B (inferred from detector ID)
`nff`	Number of fast row resets that occur before Reset Frame
`nout`	Number of simultaneous detector output channels stripes
`ref_info`	Array of reference pixel borders [lower, upper, left, right].
`scaid`	Selected SCA ID from detectors in the scaid_list attribute.
`scaid_list`	Allowed SCA IDs
`slowaxis`	Slow readout direction in sci coords
`time_exp`	Total photon collection time for all ramps.
`time_frame`	Determine frame time (sec) based on xpix, ypix, and wind_mode.
`time_group`	Time per group based on time_frame, nf, and nd2.
`time_int`	Same as time_ramp, except that 'int' follows the JWST nomenclature
`time_int_eff`	Same as time_ramp_eff, except that 'int' follows the JWST nomenclature
`time_ramp`	Photon collection time for a single ramp.
`time_ramp_eff`	Effective ramp time for slope fit tf*(ng-1)
`time_row_reset`	NFF Row Resets time per integration
`time_total`	Total exposure acquisition time
`time_total_int1`	Total time for all frames in first ramp of exposure.
`time_total_int2`	Total time for all frames in a subsequent ramp.
`times_group_avg`	Times at each averaged group since reset
`wind_mode`	Window mode attribute
`x0`
`xpix`
`y0`
`ypix`