A5101443507- Meteorological Phenomena and Simulations
- Precipitation Measurement and Analysis
- Soil Moisture and Remote Sensing
- Climate variability and models
- Oceanographic and Atmospheric Processes
- Geophysics and Gravity Measurements
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Calibration and Measurement Techniques
- Ocean Waves and Remote Sensing
- Wireless Communication Networks Research
- Membrane Separation Technologies
- Water Quality Monitoring Technologies
- PAPR reduction in OFDM
- Magnetic confinement fusion research
- Advanced Frequency and Time Standards
- Underwater Acoustics Research
- Ionosphere and magnetosphere dynamics
- Molecular Communication and Nanonetworks
- Advanced Data Processing Techniques
- ERP Systems Implementation and Impact
- Climate change and permafrost
- Groundwater flow and contamination studies
- Solar and Space Plasma Dynamics
- Plant Ecology and Soil Science
University of Kurdistan
2024
NOAA Center for Satellite Applications and Research
2020
University Corporation for Atmospheric Research
2019
Center For Remote Sensing (United States)
2018
University of Florida
2018
University of Central Florida
2013-2017
Amirkabir University of Technology
2012
Abstract The Global Precipitation Measurement (GPM) mission is a constellation-based satellite designed to unify and advance precipitation measurements using both research operational microwave sensors. This requires consistency in the input brightness temperatures (Tb), which accomplished by intercalibrating constellation radiometers GPM Microwave Imager (GMI) as calibration reference. first step sensors involves prescreening sensor Tb identify correct for biases across scan or along orbit...
The Aquarius/SAC-D mission has been providing Sea Surface Salinity (SSS), globally over the ocean, for almost 3 years. As a member of AQ/SAC-D Cal/Val team, Central Florida Remote Sensing Laboratory analyzed these salinity retrievals in presence rain and noted strong correlation between spatial patterns reduced SSS distribution rainfall. It was determined that this is result cause effect relationship, as opposed to measurement errors. Hence, it important understand changes due seawater...
A constellation of disparate radiometers is inherent to the Global Precipitation Measurement (GPM) mission concept. The task Intersatellite Calibration Working group generate adjustments make measurements all these physically consistent. key role GPM Microwave Imager (GMI) on Core satellite serve as a transfer standard among radiometers. TRMM (TMI) has served this during development phase and for interim corrections early in mission. stability GMI appears be very good based calibration been...
The Tropical Rainfall Measuring Mission (TRMM), launched in late November 1997 into a low earth orbit, produced the longest satellite-derived precipitation time series of 17 years. During second half this mission, collection cooperative weather satellites, with microwave radiometers, was combined to produce 6-h tropical product, and TRMM Microwave Imager (TMI) used as radiometric transfer standard intercalibrate constellation members. To continue valuable climate data record, Global...
The Microwave Humidity Sounders (MHS) on NOAA and Metop satellites have been extensively inter-satellite cross-calibrated; thus these MHS radiometers serve as the radiometric calibration standards for other satellite sounder radiometers. Unfortunately, (aka XCAL) between similar, but not identical, is trivial. This paper explores application of a "Double-Difference (DD)" XCAL technique to sounders, which has successfully used conical scanning microwave imagers. Specifically, water vapor...
In the summer of 2011, Aquarius earth science satellite was launched to measure Sea Surface Salinity (SSS) using a L-band microwave radiometer/scatterometer. This is an important oceanic parameter for monitoring earth's water cycle over oceans and modeling global climate change. The remote sensing SSS challenging objective. signal weak there are many interfering error sources that must be corrected achieve accurate measurement. paper deals with use random processes theory assessing effects...
This paper concerns the development of an improved algorithm for inter-satellite radiometric calibration (XCAL) microwave sounders in support NASA's Global Precipitation Mission (GPM). research extends previous XCAL work by incorporating different radiative transfer models atmospheric water vapor absorption (namely; Rosenkranz and MonoRTM) to assess robustness CFRSL "double difference" technique sounder X-CAL. presents new results GPM Microwave Imager (GMI) comparisons with SAPHIR on...
Inter-calibration of microwave atmospheric sounder channels using the GPM Microwave Imager (GMI) is a challenging task. Previously Double Difference (DD) inter-satellite radiometer calibration has been used successfully for - satellite conical scanning imagers and recently it applied to cross track scanners as well. However, in this paper, inter-calibration between scanner investigated. Here, on Special Sensor Imager/Sounder (SSMIS) Defense Meteorological Satellite Program (DMSP) are proxy...
This paper investigates SC-FDMA method for dynamic spectrum access and cognitive radios. can be viewed as a modified OFDMA with low peak power characteristics. In addition, provides high frequency diversity compared to OFDMA, allows flexible sharing between different users. We show that, this has better performance than in consumption Bit Error Rate selective fading environments. also compare the out-of band radiation of consider that similar suffers from out-of-band radiation. propose using...
This paper discusses the radiometric calibration of millimeter sounder radiometers, on polar orbiter satellites in NASA Global Precipitation Mission (GPM) constellation; and presents bias results. Because Tropical Rainfall Measurement (TRMM) operated for over 17 years, it is important to combine TRMM GPM precipitation datasets produce a climate data record global change studies. In last decade TRMM's operation, radiometers were introduced into constellation, which included: Advanced...
Sea Surface Salinity (SSS) is a tracer of the ocean circulation and fresh water exchange, between atmosphere. Hence, it provides vital information to be able understand how Earth's hydrological cycle responds climate change. An analysis Aquarius (AQ) retrievals reveals that spatial patterns reduced SSS are correlated with distribution rainfall. Therefore, important changes due seawater dilution by rain, associated near-surface salinity stratification. This paper focuses on effects produced...
The remote sensing of Sea Surface Salinity (SSS) by the Aquarius L-band radiometer is a very challenging task. This paper describes one particular challenge, namely to remove effects rain contamination on measurement ocean surface brightness temperature. Instantaneously, drops striking increases roughness that raises temperature and results in corresponding reduction retrieved SSS. Moreover, over time periods hours, accumulation can produce fresh water lens modifies brightness, which also...
This paper discusses the intersatellite radiometric calibration for microwave sounders in support of NASA’s Global Precipitation Measurement (GPM) mission. is an extension previous GPM Intersatellite Calibration Working Group work, which assesses robustness Central Florida Remote Sensing Laboratory “double difference” technique intercalibration. In this paper, we will analyze intercalibration between Advanced Technology Microwave Sounder on board National Polar-orbiting Operational...
The Tropical Rainfall Measurements Mission (TRMM) Microwave Imager (TMI), has served as the radiometric transfer standard for TRMM constellation radiometers over 17 years. final legacy processing TMI is in progress 1B11 Tb Version-8 (V8), which will be released late 2017. This paper presents a evaluation of differences between current Version-7 (V7) and newly derived V8 dataset. For this evaluation, we perform an inter-satellite calibration (XCAL) Global Precipitation (GMI) product products...
In this paper the calibration of sensors in polar orbiter satellites GPM constellation has been addressed. Since lunch TRMM at 1998, AMSU-B flown on NOAA-15, NOAA-16, NOAA-17, and MHS NOAA-18, NOAA-19, MetOp-A MetOp-B have provided an invaluable datasets full coverage earth which extensively used weather prediction. Here, between these radiometers regional scan position dependence biases investigated.