Results 31 to 40 of about 48,460 (263)
Once is enough in radiometric calibrations
Journal of Research of the National Institute of Standards and Technology, 2007 The successful development of an Optical Technology Division quality system for optical radiation measurement services has provided the opportunity to reconsider the existing calibration procedures to improve quality and reduce costs. We have instituted procedures in our calibration programs to eliminate uninformative repetitive measurements by ...
Fraser, Gerald T. +3 more
openaire +2 more sources
A study of the validation of atmospheric CO2 from satellite hyper spectral remote sensing
Advances in Climate Change Research, 2014 Three total column dry-air mole fractions of CO2 (XCO2) products from satellite retrievals, namely SCIAMACHY, NIES-GOSAT, and ACOS-GOSAT, in the Northern Hemisphere were validated by ground data from the Total Carbon Column Observing Network (TCCON). The
Miao Zhang +3 more
doaj +1 more source
Remote Sensing, 2014 FengYun-3 (FY-3) Visible Infrared Radiometer (VIRR), along with its predecessor, Multispectral Visible Infrared Scanning Radiometer (MVISR), onboard FY-1C&D have had continuous global observation more than 14 years.
Na Xu +4 more
doaj +1 more source
Visible/infrared radiometric calibration station [PDF]
SPIE Proceedings, 1994 Los Alamos National Laboratories has begun construction of a visible/infrared radiometric calibration station that will allow for absolute calibration of optical and IR remote sensing instruments with clear apertures less than 16 inches in diameter in a vacuum environment.
Byrd, D. A. +7 more
openaire +1 more source
An Adaptive Dark-Target Algorithm for Retrieving Land AOD Applied to FY-4B/AGRI Data
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingThe Fengyun 4B (FY-4B) as an operational satellite was launched on 3 June 2021. The advanced geostationary radiation imager (AGRI) aboard on the FY-4B has ability to monitor aerosols information.
Yidan Si +9 more
doaj +1 more source
Remote Sensing, 2023 In this study, a new technique is proposed to retrieve temperature and relative humidity profiles under clear sky conditions in the Arctic region based on the artificial neural network (ANN) algorithm using Fengyun-3D (FY-3D) vertical atmospheric sounder
Jingjing Hu +8 more
doaj +1 more source
METHODS OF RADIOMETRIC CALIBRATION [PDF]
, 1962 Abstract : A general treatment of the calibration of optical instruments is presented which are to be used to measure electromagnetic radiation from sources of interest to the military services. The infrared spectral region is emphasized although the ultraviolet and visible wavelengths ar also treated.
Nicodemus, Fred E. (Fred Edwin) +1 more
openaire +1 more source
Radiometric absolute noise-temperature measurement system features improved accuracy and calibration ease [PDF]
, 1970 Radiometric receiver system, which measures noise temperatures in degrees Kelvin, does not require cryogenic noise sources for routine operation. It eliminates radiometer calibration errors associated with RF attenuation measurements.
Brown, W., Ewen, H., Haroules, G.
core +1 more source
Vegetation on the move: elevational shifts and greening dynamics across the Himalayan alpine zone
Ecography, EarlyView.This study investigates alpine ‘vegetation line' (the upper limit of continuous plant community) dynamics in the Himalayan alpine zone (HAZ) over a 24‐year timescale (1999–2022) using maximum NDVI products derived from Landsat series datasets, adjusted for sampling bias using phenological modelling.
Ruolin Leng +5 more
wiley +1 more source
Future InternetContainer-based virtualization has become pivotal in cloud computing, and resource fragmentation is inevitable due to the frequency of container deployment/termination and the heterogeneous nature of IoT tasks.
Yan Guo +5 more
doaj +1 more source