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How do I choose footprints that have a small instrument aperture?

April 26, 2017aperture Footprints instrument small

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How do I choose footprints that have a small instrument aperture?

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Small aperture instruments (particularly ACS and NICMOS grism spectra) have footprints that are too small to be selected at the current default search radius of 0.20. By ‘zooming’ in on the footprint you want, the footprint can be selected graphically. The footprints can be selected by clicking on rows in the table at any zoom resolution.