Ursa Space's Man-made Targets In SAR (MANTIS) tool is a valuable resource to discover hotspots for change.
Table of Contents
1. Accuracy Metrics
2. Product Generation Latency Metrics
1. SPEX GeoJSON File Format
2. Example Product
| Status | Operational |
| Launch year | Late 2023 |
| Latest release | Version 1, late 2023 |
| Data source | SAR |
| Delivery formats | JSON |
| Delivery methods | API, S3 |
What is the Product?
Ursa’s SAR MANTIS product is an operational, SAR-based solution that uses the complex (magnitude and phase) data generated by the sensor to highlight rigid objects in contrast with more randomly shaped natural terrain and flora. The targets highlighted by this detection process tend to be human-made objects that are of interest in many applications and use cases. The detected objects are not classified or categorized, but may act as a cue for human analysis or further downstream processing. The sensitivity is a tunable parameter and may be set according to a particular application if desired.
This product can be generated from stripmap, spotlight, or scan SAR imagery, but the best results will be achieved with very high resolution spotlight imagery.
Currently, imagery from the following SAR data providers are compatible with Ursa’s MANTIS processor:
- Umbra
- Capella
- Airbus
-
Sentinel
-
e-GEOS
-
SIIS
-
ICEYE
-
MDA
Performance Metrics
Accuracy Metrics
Because MANTIS acts as a very generic object detector, and objects of interest (and conversely nuisance objects or false alarms) can vary drastically from application to application, the accuracy performance cannot be analyzed in a general sense. To understand the accuracy performance of MANTIS for a specific application, please contact your Ursa Solutioner or Sales Engineer.
Product Generation Latency Metrics
The following metrics represent approximate processing latency estimates.
-
Time from image capture to Ursa acquisition: 4-12 hours (varies)
-
Time from Ursa acquisition to product delivery: 10-15 minutes
-
Time from automated results to quality controlled results: 24-48 business hours (varies)
Standard Output File Formats
A standard SPEX Detection product will include the following files:
| File Name | File Type | Description |
| mantis_detections.json | SPEX Detections GeoJSON File | GeoJSON file containing one feature for every detected SPEX, as well as supplemental information about the SAR collection and the algorithms used. Georeferencing is provided using a WGS 84 projection. |
If another form of this data is required, Ursa can also provide the product in alternative formats. Please contact your Ursa Solutioner or Sales Engineer for more information.
MANTIS GeoJSON File
The metadata and property fields provided within the MANTIS Detections GeoJSON file are found in the following documents.
Ursa Analytic: GeoJSON Product Information
Object Detection: Product Format
The MANTIS Detection product uses the following feature properties to annotate object detections. These properties are described in the Object Detection Product Format page.
-
uuid
-
detectionNumber
-
geometrySource
-
sarLatitude
-
sarLongitude
-
sarLength
-
sarWidth
-
sarHeading
-
sarDetectionTimeUTC
Example Product Output
{
"type": "FeatureCollection",
"product": {
"productType": "Object Detection",
"documentVersion": "0.1"
},
"processors": [
{
"processorName": "MANTIS",
"version": "1.0.0",
"parameters": {
"aoi": null,
"ground_projection": "GTC",
"reference_height": null,
"polarization": null,
"remap": "remap_standard",
"min_object_size_pixels": 5,
"max_object_size_square_meters": null,
"threshold": 0.75,
"multilook_factor": 1,
"quantize_levels": null,
"blur_width_meters": 0
}
}
],
"sensorData": [
{
"sensorDataIndex": 0,
"sensorName": "CSKS1",
"sensorType": "SAR",
"sensorMode": "DYNAMIC STRIPMAP: ES-31",
"productType": "SLC",
"vendorId": "23SEP22_CSKS1_154134Z",
"startTimeUTC": "2022-09-23T15:41:34.775872Z",
"geometryReference": "POINT Z (29.416473388671875 51.49331283569336 0)",
"azimuthAngle": 96.09805607974188,
"incidenceAngle": 56.61229102647734,
"polarization": "HH",
"footprint": "POLYGON ((29.496922355528778 51.533574500025885, 29.48106997364771 51.443112966846975, 29.33629442129441 51.45280183029825, 29.351856251306483 51.54325479773766, 29.496922355528778 51.533574500025885))"
}
],
"features": [
{
"type": "Feature",
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
29.4065455640152,
51.5308672753559
],
[
29.4065629667671,
51.5308672753559
],
[
29.4065629667671,
51.5308636635564
],
[
29.4065687676843,
51.5308636635564
],
[
29.4065687676843,
51.5308528281576
],
[
29.4065629667671,
51.5308528281576
],
[
29.4065629667671,
51.530849216358
],
[
29.4065513649325,
51.530849216358
],
[
29.4065513649325,
51.5308528281576
],
[
29.4065455640152,
51.5308528281576
],
[
29.4065455640152,
51.5308564399572
],
[
29.4065397630979,
51.5308564399572
],
[
29.4065397630979,
51.5308636635564
],
[
29.4065455640152,
51.5308636635564
],
[
29.4065455640152,
51.5308672753559
]
]
]
},
"properties": {
"uuid": "3e361f55-5b44-4db3-8994-b9672df047d6",
"detectionNumber": 0,
"geometrySource": "SAR",
"sarLatitude": 51.4985591577856,
"sarLongitude": 29.35467284576592,
"sarLength": 2.008068947121501,
"sarWidth": 2.006351375952363,
"sarHeading": 0.0,
"sarDetectionTimeUTC": "2022-09-23T15:41:34.775872"
}
},
{
"type": "Feature",
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
29.3552132470072,
51.5213104536545
],
[
29.3552364506764,
51.5213104536545
],
[
29.3552364506764,
51.5213068418549
],
[
29.3552422515936,
51.5213068418549
],
[
29.3552422515936,
51.5212960064562
],
[
29.3552364506764,
51.5212960064562
],
[
29.3552364506764,
51.5212923946566
],
[
29.3552132470072,
51.5212923946566
],
[
29.3552132470072,
51.5212960064562
],
[
29.35520744609,
51.5212960064562
],
[
29.35520744609,
51.5213068418549
],
[
29.3552132470072,
51.5213068418549
],
[
29.3552132470072,
51.5213104536545
]
]
]
},
"properties": {
"uuid": "f7384753-d296-4eda-8043-1c08ca6d0720",
"detectionNumber": 1,
"geometrySource": "SAR",
"sarLatitude": 51.53051873669601,
"sarLongitude": 29.370022988822285,
"sarLength": 2.408127064583823,
"sarWidth": 2.008068947121501,
"sarHeading": 90.0,
"sarDetectionTimeUTC": "2022-09-23T15:41:34.775872"
}
}
]
}