Orbita

Long name Orbita
Short name OHS
Sensor type

Hyperspectral image in push-broom mode by CMOS sensor

• Bands collected in 400-1000nm range (Blue to Near IR)

Platform Orbita constellation, Zhuhai-1 Satellite
Key file name (use to open dataset)


                  HA*_B15_*meta.xml
                  HC*_B15_*meta.xml
                  HD*_B15_*meta.xml
                

Supported file name extensions *.tif, *rpc.txt, *.jpg
Sections

Data product name and description
Distribution disk files
Returned data for supported format
References

Data product name and description

Zhuhay Orbita Aerospace Science and Technology, also known as Orbita, was founded in China in March of 2000. Orbita is deploying the “Zhuhai-1” remote sensing micro-nanosatellite constellation, which consists of 34 video, hyperspectral, radar, and infrared satellites distributed in different orbits.

The Orbita Hyperspectral Satellite (OHS) is actually a constellation of 10-meter (m) hyperspectral microsats launched regularly since April 2018. There are four active Orbita hyperspectral satellites (OHS-A, OHS-B, OHS-C, and OHS-D).

Few satellites in orbit collect 10-m hyperspectral imagery, so OHS provides a unique regional perspective and greater coverage for the money with a 150-kilometer (km) swath width. These microsats are equipped with 32 spectral bands, offering better fidelity for spectral analysis.

The cameras on each satellite are stitched together by three Complementary Metal Oxide Semiconductors (CMOS) sensors, with specific stitching on the focal surface. Orbita Hyperspectral Satellite (OHS) collects hyperspectral imagery at 10-meter resolution in the 400-nanometer(nm) to 1,000-nm(from blue to near-infrared) spectral range.

PCI supports and has tested Level 1B datasets as follows:

Satellite ID Sensors Notes
OHS-2A


                    CCD1 - 1st CMOS sensor
                    CCD2 – 2nd CMOS sensor
                    CCD3 = 3rd CMOS sensor
                  

 
OHS-2C


                    CCD1 - 1st CMOS sensor
                    CCD2 – 2nd CMOS sensor
                    CCD3 = 3rd CMOS sensor
                  

 
OHS-2D


                    CCD1 - 1st CMOS sensor
                    CCD2 – 2nd CMOS sensor
                    CCD3 = 3rd CMOS sensor
                  

 

Distribution disk files

Orbita data sets are organized in a specific folder structure on disk. GDB uses this folder structure and the file names to identify the data product type. Therefore, to preserve compatibility with GDB, do not alter the folder structure and file names when copying and decompressing the data.

You can open an Orbita data set by selecting the *_B15_*meta.xml.

Files read by GDB when accessing an Orbita dataset:

File name Format Required Details of content/notes
*_B15_*_meta.xml xml file Yes Key file name, contains data set metadata

*_B01_*.tiff
                  ...
                  *_B032_*.tiff
                

GeoTIFF Yes Image data

*_B01_*rpc.txt
                  ...
                  *_B032_*rpc.txt
                

Text file Yes RPC data file

*_B01_*.jpg
                ...
                *_B032_*.jpg
                

Thumbnail file Optional  

Output production file name is the following: HAM1_20190611205725_0025_L1B_MSS_B32_CCD2

Where:

Returned data for supported format

Orbita(OHS) data can be opened directly in their raw vendor format or imported into a PCIDSK (*.pix) file using the key file name (*B15*meta.xml).

The following table describes the data structure after it is opened by GDB.

Product name level Data returned Details/notes

Multispectral(MSS)
                  OHS-2A Level 1B
                  OHS-2C Level 1B
                  OHS-2D Level 1B
                


                  32 x [16U] raster channels
                  1 x [TEX] product metadata file
                  1 x [ORB] Orbit segment
                  1 x [BIN] Rational Function Model
                

Radiometric Calibration values for each band are hard-coded based on detailed specification from vendor.

References

Orbita Hyperspectral Satellite Data, “User Manual: Document No.: ORBITA/BD-HSD-UMM-01”, Orbita Aerospace, 2018-09-13

OHS Wavelength Range Table:” Wavelength_Range_OHS_201909.xlsx”, Orbita Aerospace, 2019-09

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