Abstract
In this report, we present laboratory test simulation for directional responsivity of a global Earth albedo monitoring instrument. The sensor is to observe the Sun and the Earth, alternately, and measure their shortwave (<4Îm) radiations around the L1 halo orbit to obtain global Earth albedo. The instrument consists of a broadband scanning radiometer (energy channel instrument) and an imager (visible channel instrument) with ±2°field-of-view. In the case of the energy channel instrument, radiations arriving at the viewing ports from the Sun and the Earth are directed toward the pyroelectric detector via two spherical folding mirrors and a 3D compound parabolic concentrator (CPC). The instrument responsivity is defined by the ratio of the incident radiation input to the instrument output signal. The radiometers relative directional responsivity needs to be characterized across the field-of-view to assist output signal calibration. For the laboratory test, the distant small source configuration consists of an off-axis collimator and the instrument with adjustable mounts. Using reconstructed 3D CPC surface, the laboratory test simulation for predicting the instrument directional responsivity was conducted by a radiative transfer computation with ray tracing technique. The technical details of the laboratory test simulation are presented together with future plan.
| Original language | English |
|---|---|
| Title of host publication | Sensors, Systems, and Next-Generation Satellites XVI |
| Publisher | SPIE |
| ISBN (Print) | 9780819492739 |
| DOIs | |
| Publication status | Published - 2012 Jan 1 |
| Event | Sensors, Systems, and Next-Generation Satellites XVI - Edinburgh, United Kingdom Duration: 2012 Sep 24 → 2012 Sep 27 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 8533 |
| ISSN (Print) | 0277-786X |
| ISSN (Electronic) | 1996-756X |
Other
| Other | Sensors, Systems, and Next-Generation Satellites XVI |
|---|---|
| Country | United Kingdom |
| City | Edinburgh |
| Period | 12/9/24 → 12/9/27 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
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Laboratory test simulation for non-flat response calibration of global Earth albedo monitor. / Seong, Sehyun; Kim, Sug Whan; Ryu, Dongok; Hong, Jinsuk; Lockwood, Mike.
Sensors, Systems, and Next-Generation Satellites XVI. SPIE, 2012. 85331I (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8533).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Laboratory test simulation for non-flat response calibration of global Earth albedo monitor
AU - Seong, Sehyun
AU - Kim, Sug Whan
AU - Ryu, Dongok
AU - Hong, Jinsuk
AU - Lockwood, Mike
PY - 2012/1/1
Y1 - 2012/1/1
N2 - In this report, we present laboratory test simulation for directional responsivity of a global Earth albedo monitoring instrument. The sensor is to observe the Sun and the Earth, alternately, and measure their shortwave (<4Îm) radiations around the L1 halo orbit to obtain global Earth albedo. The instrument consists of a broadband scanning radiometer (energy channel instrument) and an imager (visible channel instrument) with ±2°field-of-view. In the case of the energy channel instrument, radiations arriving at the viewing ports from the Sun and the Earth are directed toward the pyroelectric detector via two spherical folding mirrors and a 3D compound parabolic concentrator (CPC). The instrument responsivity is defined by the ratio of the incident radiation input to the instrument output signal. The radiometers relative directional responsivity needs to be characterized across the field-of-view to assist output signal calibration. For the laboratory test, the distant small source configuration consists of an off-axis collimator and the instrument with adjustable mounts. Using reconstructed 3D CPC surface, the laboratory test simulation for predicting the instrument directional responsivity was conducted by a radiative transfer computation with ray tracing technique. The technical details of the laboratory test simulation are presented together with future plan.
AB - In this report, we present laboratory test simulation for directional responsivity of a global Earth albedo monitoring instrument. The sensor is to observe the Sun and the Earth, alternately, and measure their shortwave (<4Îm) radiations around the L1 halo orbit to obtain global Earth albedo. The instrument consists of a broadband scanning radiometer (energy channel instrument) and an imager (visible channel instrument) with ±2°field-of-view. In the case of the energy channel instrument, radiations arriving at the viewing ports from the Sun and the Earth are directed toward the pyroelectric detector via two spherical folding mirrors and a 3D compound parabolic concentrator (CPC). The instrument responsivity is defined by the ratio of the incident radiation input to the instrument output signal. The radiometers relative directional responsivity needs to be characterized across the field-of-view to assist output signal calibration. For the laboratory test, the distant small source configuration consists of an off-axis collimator and the instrument with adjustable mounts. Using reconstructed 3D CPC surface, the laboratory test simulation for predicting the instrument directional responsivity was conducted by a radiative transfer computation with ray tracing technique. The technical details of the laboratory test simulation are presented together with future plan.
UR - http://www.scopus.com/inward/record.url?scp=84900005429&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84900005429&partnerID=8YFLogxK
U2 - 10.1117/12.974836
DO - 10.1117/12.974836
M3 - Conference contribution
AN - SCOPUS:84900005429
SN - 9780819492739
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Sensors, Systems, and Next-Generation Satellites XVI
PB - SPIE
ER -