Data and API

Calibrated products in standard formats, delivered into your own cloud account or pulled through a STAC API. Nothing proprietary, nothing to decode.

Product levels

Levels are cumulative. You can order any level and reprocess older scenes to a newer calibration at no charge.

Product levels across sensors
Level	Optical	Thermal	Radar	Multispectral
L1B	Radiometrically corrected, sensor geometry	At-sensor radiance	SLC (complex)	Top-of-atmosphere radiance
L1C	Orthorectified reflectance	Not used	GRD (detected)	Orthorectified reflectance
L2	Surface reflectance, cloud mask	Land surface temperature	GEC (geocoded, calibrated)	Surface reflectance, indices
L3	Mosaics, cloud-free composites	Monthly composites	Coherence and change pairs	Weekly composites, field statistics

Formats and metadata

Every file opens in QGIS, GDAL, ArcGIS and the common Python and R stacks without a plugin.

Formats
Format	Used for	Notes
Cloud-optimised GeoTIFF (COG)	All raster products	Internal tiling and overviews, readable by range request, deflate or ZSTD compression
STAC 1.0 JSON	Metadata for every scene	Extensions: eo, view, sar, proj, projection; one item per scene
SICD (NITF 2.1)	Radar SLC	Complex data with full phase history, standard in interferometry tools
GeoJSON	Masks, detections, polygons	WGS 84, one feature per object, attributes in properties
GeoParquet	Field statistics and detections at scale	Columnar, partitioned by month; opens in DuckDB, GeoPandas, BigQuery

Find and fetch scenes

The API follows the open STAC specification, so existing clients work. Authentication uses OAuth 2 client credentials.

Ask for a sandbox key

Search with curl

curl -s -X POST https://api.perihel.example/stac/v1/search \
  -H "Authorization: Bearer $PERIHEL_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "collections": ["perihel-multispectral-l2a"],
    "bbox": [-101.1, 37.7, -100.7, 37.9],
    "datetime": "2025-07-01T00:00:00Z/2025-07-31T23:59:59Z",
    "query": { "eo:cloud_cover": { "lt": 10 } },
    "limit": 20
  }'

The same query in Python

from pystac_client import Client
import rasterio

api = Client.open("https://api.perihel.example/stac/v1",
                  headers={"Authorization": f"Bearer {token}"})
items = api.search(
    collections=["perihel-multispectral-l2a"],
    bbox=[-101.1, 37.7, -100.7, 37.9],
    datetime="2025-07-01/2025-07-31",
    query={"eo:cloud_cover": {"lt": 10}},
).item_collection()

with rasterio.open(items[0].assets["data"].href) as src:
    ndvi = (src.read(7) - src.read(4)) / (src.read(7) + src.read(4))

Task and receive

Order a new acquisition through the same API. The response tells you the first opportunity; a webhook calls you when the scene is delivered.

Tasking request

POST /v1/tasks
{
  "sensor": "radar",
  "mode": "stripmap",
  "polarisation": "VV",
  "geometry": { "type": "Polygon", "coordinates": [[[22.0,39.4],[22.4,39.4],[22.4,39.7],[22.0,39.7],[22.0,39.4]]] },
  "window": { "start": "2025-09-12T00:00:00Z", "end": "2025-09-14T00:00:00Z" },
  "priority": "high",
  "webhook": "https://example.com/hooks/perihel"
}

201 Created
{ "task_id": "TSK-482913", "status": "accepted", "first_opportunity": "2025-09-13T04:32:11Z" }

Sample delivery

Push delivery writes into a bucket you own, with a checksum and a delivery receipt next to each scene. Supported targets: Amazon S3, Google Cloud Storage and Azure Blob Storage.

What arrives in your bucket

s3://your-bucket/perihel/
  perihel-radar-grd/
    2025/09/13/
      PH-RAD-20250913-043157-0881.tif        412 MB   COG, float32
      PH-RAD-20250913-043157-0881.json       6 KB     STAC item
      PH-RAD-20250913-043157-0881.sha256     1 KB     checksum
      _receipt/2025-09-13T04:51:20Z.json              delivery receipt

Service levels

These are the figures written into the contract, measured and reported monthly.

Service levels
Measure	Commitment	Measured over
Delivery after downlink, median	L1B 25 min, L2 60 min	Calendar month
Delivery after downlink, 95th percentile	Within 90 minutes	Calendar month
Tasking acknowledgement	Within 30 minutes of request	Calendar month
Satellite availability	99.5 percent	Calendar month
Successful delivery of acquired scenes	99.9 percent	Calendar quarter
API availability	99.9 percent	Calendar month
Archive retention	7 years, reprocessable	Contract term
Support response, severity 1	30 minutes, 24 hours a day	Per incident

Questions about data

Test the API before you sign

A sandbox key and an engineer to answer questions are free.