Odyssey THEMIS VIS Experiment Data Record (VISEDR)

VISEDR – Visible Experiment Data Record

Instrument: Thermal Emission Imaging System

PDS Data Set ID: ODY-M-THM-2-VISEDR-V1.0 (in data directories odtve1_****)DOI: 10.17189/1520344

For more information about THEMIS VISEDR products, see the Data Set Catalog File.

For more information about all THEMIS products, see the THEMIS Product SIS.

The Thermal Emission Imaging System (THEMIS) Visible Experiment Data Record (EDR) data products contain the raw visible observations. Data is translated into a raw image QUBE. The process returns an individual spectral image QUBE containing raw Digital Number (DN), with missing data filled and an attached PDS label. Each QUBE header includes basic parameters describing the observation and various telemetry information associated with the observation.

THEMIS VIS images are acquired in framelets of size 1024 pixels crosstrack by 192 lines downtrack. The number of framelets is determined by the number of bands selected (five available, enumerated in the table below) and the spatial resolution selected (three summing modes available). If spatial summing is not applied, either a single-band, 19-framelet (65.6 km) image or a 5-band, 3-framelet (10.3 km) image can be collected.

THEMIS available visible bands:

Band Numbers	Center (μm)	FWHM* (μm)
V-1	0.425	0.049
V-2	0.540	0.051
V-3	0.654	0.053
V-4	0.749	0.053
V-5	0.860	0.045

*Full-width, Half-maximum

THEMIS VISEDR products have the following file names:

VnnnnnsssEDR.QUB

where:

nnnnn = 5-digit mission orbit when the image was collected

sss = 3-digit image sequence number indicating the order that images were collected each orbit (001 = first image collected in the nnnnn orbit)

In ODE, VISEDR products have the following Product IDs:

VNNNNNSSSEDR