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About SkySat

SkySat is a constellation of 21 high-resolution Earth imaging satellites owned and operated by the commercial company Planet Labs. SkySat-1 was launched in 2013 and a launch programme has followed.

The first two SkySat satellites (SkySat-1 and SkySat-2) are A and B Generations, the other 19 satellites are modernised C Generation satellites.

Six of the C-Generation SkySat satellites (from SkySat-16 to SkySat-21) were launched into non-sun-synchronous orbits to increase the image cadence between 52 degrees northern and southern latitude up to 6-7 times per day on worldwide average, with a maximum of 12.

Mission Parameters
OperatorPlanet Labs
Date of LaunchSkySat-1: 21/11/23
SkySat-2: 08/07/2014
SkySat-3: 22/09/2016
SkySat-4-7: 16/09/2016
SkySat-8-13: 31/10/2017
SkySat-14-15: 03/12/2018
SkySat-16-18: 13/06/2020
SkySat-19-21: 18/08/2020
Mission StatusOperating nominally
Orbit TypeSkySat-1-15: Sun-synchronous
SkySat-16-21: inclined, non sun-synchronous
Orbit AltitudeSkySat-1-2: 600 km
SkySat-3-15: 500 km at launch, lowered to 450 km in early 2020
SkySat-16-18: 400 km
Equator Crossing TimeSkySat-1, 3-7, 14-15 : approximately 10:30 a.m.
SkySat-2, 8-13: approximately 13:00 p.m.
SkySat-16-21: variable
Number of Satellites21

SkySat Objectives

The SkySat constellation collects thousands of square kilometres of imagery. Each satellite is three-axis stabilised and agile enough to slew between different targets of interest.

SkySat Instruments

SkySat Camera

This is a Cassegrain telescope with a focal length of 3.6 m, with three 5.5 megapixel CMOS imaging detectors making up the focal plane and able to collect frame imagery, stereo imagery, and video by day and by night.

In early 2020 the Skysat C-generation orbits were lowered from 500 km to 450 km altitude which, together with various processing evolutions, brought an improvement of the spatial resolution.

Sensor Parameters
Sensor TypeSkySat Satellites have three CMOS Frame Cameras per satellite with Panchromatic and Multispectral halves, which capture overlapping strips. Each of these strips contain overlapping scenes.
Spectral BandsBlue 450-515 nm
Green 515-595 nm
Red 605-695 nm
NIR 740-900 nm
PAN 450-900 nm
Ground Resolution after Super-Resolution processing (nadir)[SkySat-1, SkySat-2] -A/B Generation
Panchromatic: 0.86 m
Multispectral: 1.0 m

[SkySat-3 - SkySat-15] -C Generation
Panchromatic: 0.65 m (0.72 m before 30/06/2020)
Multispectral: 0.81 m (1.0 m before 30/06/2020)

[SkySat-16 - SkySat-21] -C Generation
Panchromatic: 0.57 m
Multispectral: 0.75 m
Ortho Product Pixel Size0.50 m
Swath Width8 km at nadir (SkySat-1-2)
5.9 km at nadir (SkySat-3-15)
5.5 km at nadir (SkySat-16-21)
Maximum Image Strip Length200 km
Revisit TimeConstellation: sub-daily, 6-7 times at worldwide average, 12 times max.
Satellite: 4-5 days (Reference altitude 500 km)
Image Capture Capacity400k km² /day

SkySat Data

DATA COLLECTIONS

ESA is offering, for scientific research and application development, access to archive and new tasking data from the SkySat mission upon submission and acceptance of a project proposal. These collections are available as part of the Planet imagery offer.

ESA will support as many high-quality and innovative projects as possible within the quota limit available, therefore only a limited amount of products can be made available to each project.

The following data collections are available:

Product Information

NameDescriptionProduct Level
SkySat Basic Scene ProductThe SkySat Basic Scene product includes Analytic and Panchromatic imagery that is uncalibrated and in a raw digital number format. The Basic Scene Product is not radiometrically corrected for atmosphere or for any geometric distortions inherent in the imaging process. It is provided with RPC values for geopositioning.Level 2B
SkySat Visual Ortho SceneThe SkySat Visual Ortho Scene product is orthorectified, pansharpened, and color-corrected (using a color curve) 3-band RGB Imagery.Level 3B
SkySat Pansharpened Multispectral Ortho SceneThe SkySat Pansharpened Multispectral Scene product is orthorectified, pansharpened, and color-corrected (using a color curve) 4-band BGRN Imagery.Level 3B
SkySat Analytic DN Ortho SceneThe SkySat Analytic DN Ortho Scene product is orthorectified, multispectral data from the SkySat constellation. The Analytic DN product is an uncalibrated, digital number imagery product. This product is designed for a wide variety of applications that require imagery with an accurate geolocation and cartographic projection. The product has been processed to remove distortions caused by terrain. It eliminates the perspective effect on the ground (not on buildings), restoring the geometry of a vertical shot. In addition to orthorectification, the imagery has radiometric corrections applied to correct for any sensor artifacts. The initial availability does not include transformation to at-sensor radiance.Level 3AB
SkySat Panchromatic DN Ortho SceneThe SkySat Panchromatic Ortho Scene product is orthorectified, panchromatic data from the SkySat constellation. The Panchromatic DN product is an uncalibrated, digital number imagery product. The Panchromatic product has a finer GSD than the Analytic Product due to NOAA license restrictions, and is useful for visual interpretation as well as pan-sharpening of coarser resolution Multispectral data. The initial availability does not include transformation to at-sensor radiance.Level 3BA
SkySat Analytic Ortho SceneAnalytic products are calibrated multispectral imagery products that have been processed to allow analysts to derive information products for data science and analytics. The imagery has radiometric corrections applied to correct for any sensor artifacts and transformation to top-of-atmosphere radiance. (product is not available for images acquired before October 2017).Level 3B
SkySat Ortho Collect ProductThe Ortho Collect product is created by composing SkySat Ortho Scenes along an imaging strip into segments typically unifying ~60 SkySat Ortho Scenes. The product may contain artifacts resulting from the composing process, particular offsets in areas of stitched source scenes. In a next version, artifacts caused by scene misalignment will be hidden by cutlines. This is particularly important for the appearance of objects in built-up areas and their accurate extraction.Level 3B
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