@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/d8ff2cc4-d922-4661-8bba-fd78c7672ce9>
  skos:changeNote """2018-07-11 12:50:15.0 [mmorahan] Insert Concept 
add broader relation (WV60 [d8ff2cc4-d922-4661-8bba-fd78c7672ce9,367843] - Cameras [d322ae9d-bde0-448f-948d-777aef096eb6,348777]); 
""", """2018-07-11 12:53:22.0 [mmorahan]  
insert AltLabel (id: null
category: primary
text: WorldView-60 camera
language code: en); 
insert Definition (id: null
text: WV60 was designed and developed by BATC. The objective is to provide highly detailed imagery for a wide spectrum of applications such as precise map creation, change detection and in-depth image analysis (note that imagery must be re-sampled to 50 cm for non-US Government customers).

Instrument optics

- Use of QuickBird optical bench design
- Telescope of 60 cm aperture

Spectral range (panchromatic imagery only)

0.45 - 0.90 µm

Spatial resolution (GSD)

- 50 cm panchromatic at nadir
- 55 cm out to 20º off-nadir

Swath width

17.6 km at nadir

Revisit frequency

- 1.7 days at 1 m GSD or less
- 5.9 days at 20º off-nadir or less (0.51 m GSD)

Detectors

- Silicon CCD array (8 µm pixel size) with a row of > 35,000 detectors
- The array includes 64 stages of TDI (35,000 columns and 64 rows)

TDI (Time Delay Integration)

6 selectable levels from 8 to 64

Data quantization

11 bit

Geolocation accuracy of imagery after processing

- 5.8 to 7.6 m without GPCs
- 2 m with GPCs

Instrument mass, power

380 kg, 250 W

WV60 consists of the following elements: Optical subsystem, FPU (Focal Plane Unit) and the DPU (Digital Processing Unit), with FPU and DPU designed and custom-built by ITT Space Systems Division, formerly Kodak Remote Sensing Systems of Rochester, New York.

The optical subsystem, mounted on an optical bench (with sunshield and internal baffling to suppress stray light), is of Ball design (telescope aperture of 60 cm diameter, lightweight structure, focal length of 8.8 m, f/14.7, the telescope mass is 138 kg, telescope size: 115 cm x 141 cm x 195 cm), providing a FOV (Field of View) of 2.12º, obtained with an unobscured off-axis three-mirror-anastigmatic (TMA) optical form. A fourth mirror is used to fold the light bundle for compact telescope packaging.

The pushbroom imager is rigidly aligned with the S/C axis, providing a nominal body-pointing capability of ±40º into the along-track and cross-track directions (45º max). WV60 may also be used for stereo imaging by slewing the S/C fore and aft. The TDI feature provides a capability for low-light observations of imagery. The on-board processor provides real-time radiometric/geometric calibration and image compression for all imaging data. The focal plane array and the compression technique ADPCM (Adaptive Differential Pulse Code Modulation) employed are provided by Kodak. Instrument mass = 380 kg, instrument power = 250 W.

DigitalGlobe's imagery may be used for a number of mapping and planning activities within the defense, intelligence, and commercial markets around the world.

Spectral band

Center wavelength (nm)

Minimum lower band edge (nm)

Maximum upper band edge (nm)

Pan (WorldView-1) imager

650

400

900

Pan (WorldView-2) imager

625

450

800

MS1 (NIR1)

835

770

895

MS2 (red)

660

630

690

MS3 (green)

545

510

580

MS4 (blue)

480

450

510

MS5 (red edge)

725

705

745

MS6 (yellow)

605

585

625

MS7 (coastal)

425

400

450

MS8 (NIR2)

950

860

1040
language code: en); 
""", """2019-02-22 17:09:36.0 [mmorahan]  
insert WeightedRelation (id: null
related concept uuid: d8ff2cc4-d922-4661-8bba-fd78c7672ce9
relationship type: null
relationship value: null
generated by: null); 
""" ;
  ns0:altLabel [ ] ;
  skos:definition """WV60 was designed and developed by BATC. The objective is to provide highly detailed imagery for a wide spectrum of applications such as precise map creation, change detection and in-depth image analysis (note that imagery must be re-sampled to 50 cm for non-US Government customers).

Instrument optics

- Use of QuickBird optical bench design
- Telescope of 60 cm aperture

Spectral range (panchromatic imagery only)

0.45 - 0.90 µm

Spatial resolution (GSD)

- 50 cm panchromatic at nadir
- 55 cm out to 20º off-nadir

Swath width

17.6 km at nadir

Revisit frequency

- 1.7 days at 1 m GSD or less
- 5.9 days at 20º off-nadir or less (0.51 m GSD)

Detectors

- Silicon CCD array (8 µm pixel size) with a row of > 35,000 detectors
- The array includes 64 stages of TDI (35,000 columns and 64 rows)

TDI (Time Delay Integration)

6 selectable levels from 8 to 64

Data quantization

11 bit

Geolocation accuracy of imagery after processing

- 5.8 to 7.6 m without GPCs
- 2 m with GPCs

Instrument mass, power

380 kg, 250 W

WV60 consists of the following elements: Optical subsystem, FPU (Focal Plane Unit) and the DPU (Digital Processing Unit), with FPU and DPU designed and custom-built by ITT Space Systems Division, formerly Kodak Remote Sensing Systems of Rochester, New York.

The optical subsystem, mounted on an optical bench (with sunshield and internal baffling to suppress stray light), is of Ball design (telescope aperture of 60 cm diameter, lightweight structure, focal length of 8.8 m, f/14.7, the telescope mass is 138 kg, telescope size: 115 cm x 141 cm x 195 cm), providing a FOV (Field of View) of 2.12º, obtained with an unobscured off-axis three-mirror-anastigmatic (TMA) optical form. A fourth mirror is used to fold the light bundle for compact telescope packaging.

The pushbroom imager is rigidly aligned with the S/C axis, providing a nominal body-pointing capability of ±40º into the along-track and cross-track directions (45º max). WV60 may also be used for stereo imaging by slewing the S/C fore and aft. The TDI feature provides a capability for low-light observations of imagery. The on-board processor provides real-time radiometric/geometric calibration and image compression for all imaging data. The focal plane array and the compression technique ADPCM (Adaptive Differential Pulse Code Modulation) employed are provided by Kodak. Instrument mass = 380 kg, instrument power = 250 W.

DigitalGlobe's imagery may be used for a number of mapping and planning activities within the defense, intelligence, and commercial markets around the world.

Spectral band

Center wavelength (nm)

Minimum lower band edge (nm)

Maximum upper band edge (nm)

Pan (WorldView-1) imager

650

400

900

Pan (WorldView-2) imager

625

450

800

MS1 (NIR1)

835

770

895

MS2 (red)

660

630

690

MS3 (green)

545

510

580

MS4 (blue)

480

450

510

MS5 (red edge)

725

705

745

MS6 (yellow)

605

585

625

MS7 (coastal)

425

400

450

MS8 (NIR2)

950

860

1040"""@en ;
  skos:prefLabel "WV60"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/d322ae9d-bde0-448f-948d-777aef096eb6> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/d322ae9d-bde0-448f-948d-777aef096eb6>
  skos:prefLabel "Cameras"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/d8ff2cc4-d922-4661-8bba-fd78c7672ce9> .

