Odyssey THEMIS IR Projected Brightness Temperature Image V1 (IRPBT1)
IRPBT1 – Infrared Projected Brightness Temperature Image V1
Instrument: Thermal Emission Imaging System
PDS Data Set ID: ODY-M-THM-5-IRPBT-V1.0 (in data directories odtip1_****)DOI: 10.17189/1520259
The Thermal Emission Imaging System (THEMIS) Infrared Projected Brightness Temperature Image V1 (IRPBT1) data products are available as the projected equivalent product of the standard Infrared Brightness Temperature Record (IRBTR) images. IRPBT1s are usually derived from band IR-9 (see the table below) of the corresponding Infrared Geometric Projection V1 (IRGEO1) product. If the default band is not available, or significantly corrupt, another band may be used.
THEMIS IR images are acquired at selectable image lengths and in combinations of ten selectable bands (enumerated in the table below). The image width is 320 pixels (32 km, based on the nominal 400 km mapping orbit) and the length is variable, in multiples of 256 line increments, with a minimum and maximum image lengths of 272 and 65,296 lines respectively (27.2 km and 6,530 km, based on the nominal mapping orbit). The IR focal plane is covered by ten ~1 μm-bandwidth strip filters, producing ten band images with bands 1 and 2 having the same wavelength range.
THEMIS available infrared bands:
|
Band Numbers |
Center (μm) |
FWHM* (μm) |
|
IR-1 |
6.78 |
1.01 |
|
IR-2 |
6.78 |
1.01 |
|
IR-3 |
7.93 |
1.09 |
|
IR-4 |
8.56 |
1.16 |
|
IR-5 |
9.35 |
1.20 |
|
IR-6 |
10.21 |
1.10 |
|
IR-7 |
11.04 |
1.19 |
|
IR-8 |
11.79 |
1.07 |
|
IR-9 |
12.57 |
0.81 |
|
IR-10 |
14.88 |
0.87 |
*Full-width, Half-maximum
THEMIS IRPBT1 products have the following file names:
InnnnnsssPBT.IMG
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, IRPBT1 products have the following Product IDs:
INNNNNSSSPBT