VNIR-250 Data Specification
The VNIR-250 product offers high-resolution imagery in the Visible and Near-Infrared spectrum.
The optical payload is an iSIM-90 integrated Standard Imager developed by SATLANTIS and is a new generation of high-resolution multi-spectral optical imager for earth observation developed for 12U or larger CubeSats.
Technical Specifications Overview
- 1 satellite
- Swath Width: 13 km
- Resolution: 4096 x 3072 pixels
- Bit Depth: 12 bits
- RGB Ground Sampling Distance (GSD): 2.2 m at 500 km
- NIR Ground Sampling Distance (GSD): 3.0 m at 500 km
Spectral Bands
The multispectral payload captures 4 channels in the visible and near infrared spectral range. These channels align with the corresponding channels in Sentinel 2 imagery. The range of each channel is given below:
- Band 1: 830nm - NIR 190nm wide
- Band 2: 640nm - Red 100nm wide
- Band 3: 570nm - Green 70nm wide
- Band 4: 500nm - Blue 60nm wide
File Naming Convention
The file names for MANTIS data products follow a standard convention as defined in the table below. This convention captures high level metadata in the name to allow for quick and easy visual identification.
Example: MANTIS_L1D_R_000000000000_20211001101205_20211001101210_E72EFC12
| Name | Description | Example |
|---|---|---|
| Mission | Name of Mission in string format | MANTIS |
| Type | Type of image data, typically the frequency of the band | R, G, B or NIR |
| Level | The corresponding processing level of the image | L1D, L2A etc. |
| Spare | Spare 12 characters for future use | 000000000000 |
| Start | Datetime of the start of image capture | 20211224012812 |
| End | Datetime of the end of image capture | 20211224012817 |
| CRC | Cyclic Redundancy Check (CRC32-c) | E72EFC12 |
L1D Data Product
Collection ID: mantis_l1d-cogs
This collection consists of MANTIS L1D data products. These data products are defined as ortho-ready high resolution imagery with the following processes applied:
- Radiometric correction to Top-of-Atmosphere (TOA)
- Geometric correction to an accuracy of ~100m
- Pan Sharpening
- Ortho-ready, metadata files containing Rational Polynomial Coefficients (RPCs)
Assets
All MANTIS L1D Items in the Collection have the following assets with the corresponding asset field key, file format and descriptions.
| Title | Key | File Format | Description |
|---|---|---|---|
| Band 4 (Blue) | "B" | COG | Cloud optimised raster data containing blue band spectral data |
| Band 3 (Green) | "G" | COG | Cloud optimised raster data containing green band spectral data |
| Band 2 (Red) | "R" | COG | Cloud optimised raster data containing red band spectral data |
| Band 1 (NIR) | "NIR" | COG | Cloud optimised raster data containing infra-red band spectral data |
| True Colour Image | "TCI" | COG | Cloud optimised raster data containing true colour RGB composite image |
| Rational Polynomial Coefficients (RPCs) | "RPC" | "_rpc.txt", CE NITF v2.1 | Text file containing RPCs for RGB and NIR images following the National Imagery Transmission Format (NITF) standard Version 2.1 |
| Thumbnail (TCI) | "thumbnail" | webp | A low resolution true colour composite image for quick visualisation of imagery data, typically used as a preview in the browser |
STAC Extensions
The following STAC extensions have been used in this collection to provide additional information in a standardised format.
Ancillary
See the common Open Cosmos Ancillary Format.