CALPRODUCT-NS-007: NISP-S Wavelength Dispersion Check¶

Parent requirement¶

Scheduling¶

Monthly

Time-critical¶

no

Objective¶

Validate the wavelength dispersion model based on secondary wavelength calibrators in the Self-cal field. The secondary standards were identified during PV phase, when the wavelength dispersion was initially determined based on observations of planetary nebulae.

We do not expect to be able to derive a suitably accurate full dispersion solution from the secondary standards. This is due to a likely insufficient spatial density of sources with suitably spectral features. However, we do expect sufficiently many features to reveal a significant drift from the currently established wavelength solution, indicating the need for recalibration with CALPRODUCT-NS-008: NISP-S Wavelength Dispersion with Planetary Nebulae.

Fulfilled by¶

CALBLOCK-PV-001: Self Calibration

CALBLOCK-F-001: Self Calibration

Data volume¶

NISP: 51584 MB = 320*NS + 16*(NP*3)

VIS: 144640 MB = 320*VS

Processing input¶

Ground Processing Input Data: All calibration products to run the standard science pipeline (BPM, darks, flat, nonlinearity etc), ground-based dispersion data/model.

Data Description:

NISP-S: 320 = 5*16*4 spectro MACC images

NISP-P: 48 = 3*16 photo MACC images

VIS: 320 = 4*5*16 images

Processing output¶

Residuals with respect to the wavelength dispersion established from the PN data.

Processing tools¶

L1 science pipeline and line measurement pipeline (?), additional offline trend analysis of dispersion combined with ground data/model

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