Multispectral sensor, 5 m, eight bands

Eight bands from coastal blue to near infrared. Healthy plants turn red in a colour-infrared composite, and stressed fields fade weeks before the eye can tell.

Colour-infrared image of farmland where healthy crops appear bright red and bare soil pale green — Colour-infrared composite (near infrared, red, green), 28 July 2025. Healthy crops are red; harvested and fallow ground is pale. Imagery: Contains modified Copernicus Sentinel data (2025), Sentinel-2. Example standing in for a Perihel multispectral product.

Specification

PH-M payload on the Perihel standard bus, orbit 525 km sun-synchronous.

Ground sample distance	5 m
Swath width	45 km
Spectral bands	8: coastal blue 443, blue 490, green 560, red 665, red edge 705, red edge 740, near infrared 842, near infrared 865 nm
Band width	15 to 115 nm, see band table in the datasheet
Radiometric resolution	12 bit
Signal to noise	Above 120 at reference radiance
Revisit, one satellite	2 days
Co-registration	Band to band better than 0.2 pixel
Local overpass time	10:30 descending
Calibration	Solar diffuser and lunar views
Downlink	X-band, 800 Mbit/s

Products and formats

Every scene is delivered as a cloud-optimised GeoTIFF with a STAC item. Levels are cumulative: you can order L1B and reprocess to L2 later.

Product levels
Level	Content	Format	Delivery after downlink
L1C	Orthorectified top-of-atmosphere reflectance, all eight bands	COG GeoTIFF	35 min
L2A	Surface reflectance, cloud, shadow and snow mask	COG GeoTIFF	55 min
Indices	NDVI, EVI, NDWI, red-edge chlorophyll index	COG GeoTIFF, int16, scale 0.0001	60 min
L3	Weekly cloud-free composites, field-level statistics	COG GeoTIFF, GeoParquet	Within 24 h

Example products

NDVI map of the same fields, healthy crops dark green, bare ground brown — Vegetation index (NDVI), 28 July 2025. Brown is bare, dark green is dense healthy crop.

NDVI map of the same fields in 19 May — 19 May

NDVI map of the same fields in 18 June — 18 June

NDVI map of the same fields in 28 July — 28 July

NDVI map of the same fields in 22 August — 22 August

Imagery: Contains modified Copernicus Sentinel data (2025), Sentinel-2, southwest Kansas. Four dates show the crop calendar of the same square: wheat in May, corn through July, harvest in August.

Resolution and revisit

Revisit of a mid-latitude point improves with every satellite you add to the plane. See the coverage page for the ground tracks.

Revisit by fleet size
Satellites	Revisit
1	48 h
3	16 h
6	8 h
12	4 h

Try the coverage calculator

Typical uses

Crop monitoring: Field-level vigour, emergence and senescence, and yield models fed every two days.
Forestry: Clear-cuts, thinning and storm damage found against harvest plans.
Water quality: Chlorophyll and turbidity in lakes and coastal water.
Mining and land cover: Spectral signatures of exposed rock, tailings and rehabilitation.

Sample delivery

Each scene arrives with a STAC item that any STAC client reads. Query it through our API or find it next to the data in your own bucket.

Delivered item, abbreviated

{
  "type": "Feature",
  "stac_version": "1.0.0",
  "id": "PH-MUL-20250728-173012-0412",
  "collection": "perihel-multispectral-l2a",
  "properties": {
"datetime": "2025-07-28T17:29:31Z",
    "perihel:level": "L2A",
    "gsd": 5,
    "eo:bands": 8,
    "eo:cloud_cover": 0.3,
    "perihel:ndvi_mean": 0.58,
    "proj:epsg": 32614
  },
  "assets": {
    "data": { "href": "s3://your-bucket/perihel/perihel-multispectral-l2a/PH-MUL-20250728-173012-0412.tif",
              "type": "image/tiff; application=geotiff; profile=cloud-optimized" },
    "metadata": { "href": "s3://your-bucket/perihel/perihel-multispectral-l2a/PH-MUL-20250728-173012-0412.json" }
  }
}

Questions about multispectral

Task a multispectral satellite

Tell us the area and the revisit you need. An engineer replies with orbit, sensor and fee.

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