SkySat INSTRUMENTS

Explore instruments used in SkySat mission.

EXPLORE INSTRUMENTS

SkySat Data

Discover how to access SkySat data.

ACCESS MISSION DATA

SkySat is a constellation of high-resolution Earth imaging satellites from the commercial company Planet.

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
Operator Planet Labs
Date of Launch

SkySat-1: 21 Nov 2013
SkySat-2: 8 Jul 2014
SkySat-3: 22 Sep 2016
SkySat-4 to 7: 16 Sep 2016
SkySat-8 to 13: 31 Oct 2017
SkySat-14-15: 3 Dec 2018
SkySat 16-18: 13 June 2020
SkySat 19-21: 18 Aug 2020

Mission Status Operating nominally
Orbit Type

SkySat 1-15: Sun-synchronous

SkySat 16-21: inclined, non sun-synchronous

Orbit Altitude

SkySat 1-2: 600km

SkySat 3-15: 500km at launch, lowered to 450km in early 2020

 SkySat 16-18: 400km

Equator Crossing Time

SkySat-1, 3-7, 14-15 : approximately 10:30 a.m.

SkySat-2, 8-13 : approximately 1:00 p.m.

SkySat-16-21 : variable

Number of Satellites

21

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 Type SkySat 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 Bands Blue 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: 0.65m (0.72 m before 30/06/2020)
Multispectral: 0.81m (1.0 m before 30/06/2020)

[SkySat-16 - SkySat-21] -C Generation

Panchromatic: 0.57m

Multispectral: 0.75m

Ortho Product Pixel Size 0.50m
Swath Width

8 km at nadir (SkySat-1 to -2)

5.9 km at nadir (SkySat-3 to -15)

5.5 km at nadir (SkySat-16 to -21)

Maximum Image Strip Length

200 km

Revisit Time

Constellation: sub-daily, 6-7 times at worldwide average, 12 times max.

Satellite: 4 - 5 days (Reference altitude 500 km)

Image Capture Capacity 400k km² /day

SkySat Data

DATA DESCRIPTION

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 products 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

Name Description Product Level
SkySat Basic Scene Product The 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 Scene The 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 Scene The 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 Scene The 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 Scene The 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 Scene Analytic 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 Product The 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