Ramp Format#

Load Level 1 ramp data products.

Overview#

The Ramp format is used for loading JWST Level 1 “ramp” data, which contains the raw accumulated signal measured in multiple reads during an exposure.

Usage#

import jdaviz
jdaviz.show()

# Load ramp data
jdaviz.load('ramp.fits', format='Ramp')

Data Requirements#

Ramp data typically contains:

  • Multiple reads of the same pixels over time

  • 4D data structure: (integrations, groups, y-pixels, x-pixels)

  • Detector metadata and timing information

This data format is specific to JWST observations before they are processed through the calibration pipeline.

UI Access#

v0.1
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Data Menu

Control data and subset layer order and visibility for each viewer. Toggle layer visibility, reorder layers by dragging, and manage which data appears in the viewer. 

dm = jd.viewers[viewer].data_menu

See Also#

  • Rampviz - For information on displaying and analyzing ramp data