| AHS |
AHS
The INTA-AHS 80Airborne Hyperspectral Scanner (AHS) is based on the integration of many advanced technologies developed by SenSyTech under R & D contracts over the past few years. While the combination of these components is offered here for the first time, each of the individual items has been delivered and field-tested in operational use. The AHS incorporates advanced components to ensure high performance while maintaining the ruggedness to provide operational reliability in a survey aircraft.
Whiskbroom linescanner type airborne sensor designed to fulfill the needs of INTA remote sensing laboratory users in the hyperspectral field. INTA aims to offer to the remote sensing scientific community a tool to carry out projects in which high spatial, radiometric and spectral resolutions be required. Gathered raw-data are recorded on board in a standard hard disk support, and are immediately accessible through an Ethernet connection.
Figure 3.1. The Airborne Hyperspectral Scanner (AHS)
AHS technical specifications:
• FOV: 90º
• IFOV: 2,5 mrad
• GFOV: 2 ÷ 6 m @140 kts platform speed
• Scan rate: 6.25, 12.5, 18.75, 25, 31.25, 35 r.p.s.
• Digitisation accuracy: 12 bits
• Pixels per scanline: 750
• Reference sources: two controllable thermal blackbodies.
Arrangement of spectral bands:
| Optical port |
Channels |
Number of bands |
Spectral region |
Band width |
Visible and Near Infrared |
1-20 |
20 |
441 - 1018 nm |
30 nm |
Near Infrared |
21 |
1 |
1.491 - 1.650 µm |
0.200 µm |
Near Infrared |
22-63 |
42 |
2.019 - 2.448 µm |
0.013 µm |
Mid Infrared |
64-70 |
7 |
3.03 - 5.41 µm |
0.300 µm |
Long Wave Infrared |
71-80 |
10 |
7.95 - 13.17 µm |
0.40-0.50 µm |
FLIGHT DATA & AHS SETTINGS
| Aircraft Nominal aircraft ground speed Altitude above ground level Mean ground elevation AHS installation IMU installation AHS scan rate AHS IFOV/FOV AHS pixel size @nadir - GIFOV AHS along-track scanline overlap AHS nominal coverage AHS internal thermal reference sources AHS spectral configuration AHS calibration date |
CASA 212-200 N/S 270, "Paternina" |
(Further information about AHS can be found at www.inta.es and www.crepad.rcanaria.es/info/npoc/indexlab.html)
AHS Quicklooks during Mission 1
AHS-INTA MISSION 2 QUICKLOOKS