Raytheon has developed a new tactical form-factored, imaging LADAR (LAser Detection And Ranging) seeker. In a joint activity with AMRDEC, the seeker was used in a tower test data collection at the Russell Measurement Facility at Redstone Arsenal, Alabama. The seeker collected 3D imagery of fixed structures and vehicles embedded in various clutter backgrounds for use in analysis of computer vision and automatic target recognition techniques. This paper presents a high-level overview of the seeker, a description of the test activities, representative LADAR range and intensity imagery collected during the test, and 3D rendered scenes constructed from the imagery.
The ATLAS (Airborne Terrestrial Applications Sensor) is a 15-channel multispectral scanning imager, currently under development for NASA's Commercial Remote Sensing Program Office. The sensor package utilizes a rotating linescan mirror, and a modified Dall-Kirkham telescope with a 7.5-inch clear aperture and 2.0 mrad ifov. Scan rates are adjustable from 6 - 50 rev/sec, with a total of approximately 73 degree(s). Three spectrometers with grating dispersive elements are used to provide wide spectral coverage. Blackbody sources (hi/lo) and a modified integrating sphere source, built into the scanhead, are employed to provide in-flight radiometric calibration data for quantitative inference of ground scene temperatures and radiance values. In this paper, the overall design of the ATLAS scanner system is reviewed. Results of spectral response, NETD, NER, and MTF calibration measurements are presented for each channel. Additionally, some initial ATLAS flight test data and analysis are described, including SNR, uniformity of TIR data over water, overall image quality and other results.
The ATLAS (Airborne Terrestrial Applications Sensor) system is a 15-channel imager for remote sensing applications currently under development at the NASA Stennis Space Center. This paper describes the optical design of the scan head optics, which include the linescan mirror, Dall-Kirkham telescope, collimator, and three spectrometers. The sensor package has a 7.5-inch entrance aperture with a 2.0 mrad ifov, total field of view of 73 degrees, and scan rates adjustable in the range 6 - 50 rev/sec. Spectral coverage is provided in the visible and near infrared (VIS/NIR, 0.45 - 0.90 micrometers , 6 channels) using three spectrometers. The three spectrometers have a modular design for future applications growth. Design and specifications for the telescope, special dichroics, gratings, imaging lenses and other components for the spectrometers, will be described. Detector arrays for the three spectrometers, and built-in sources for radiometric calibration, will also be discussed. Finally, results of overall ATLAS systems performance analysis on optical throughput, SNR, NETD, etc, will be presented.
Funded by NASA's Office of Commercial Programs, the ATLAS (Airborne Terrestrial Applications Sensor) is a 15-channel multispectral imager for remote sensing applications under development at the Stennis Space Center (MS). This paper describes the overall ATLAS system design, functional sub-systems, and projected sensor performance characteristics (SNR, NETD, etc). In order to satisfy a variety of applications, both wide spectral coverage (0.45 - 12.2 micrometers ), as well as variable spatial resolution (2 - 25 m), are provided. The optics train includes a linescan mirror, Dall-Kirkham telescope, and three spectrometers. The ATLAS sensor package has a 7.5-inch entrance aperture, 2.0 mrad ifov, total field of view of 73 degree(s), and scan rates of 6 - 50 rev/sec. The spectrometer channels are divided as follows: VIS/NIR, 6 channels: 0.45 - 0.90 micrometers ; SWIR/MWIR, 3 channels: 1.55 - 4.20 micrometers ; and TIR, 6 channels: 8.2 - 12.2 micrometers . The ATLAS system combines the functionality of the TIMS (Thermal Infrared Multispectral Scanner) and the CAMS (Calibrated Airborne Multispectral Scanner), currently deployed, calibrated, and maintained by the Advanced Sensor Development Laboratory at Stennis Space Center. The major optical sub- systems, radiometric calibration sources, signal conditioning electronics, and other functions, will be described. ATLAS system specifications will also be presented.