The Suomi National Polar‐Orbiting Partnership (NPP) satellite was launched on 28 October 2011 and carries the Advanced Technology Microwave Sounder (ATMS) board. ATMS is a cross‐track scanning instrument observing in 22 channels at frequencies ranging from 23 to 183 GHz, permitting measurements of atmospheric temperature moisture under most weather conditions. In this study, radiometric calibration algorithm used operational system first evaluated through independent analyses prelaunch...

The development and continuity of consistent long-term data records from similar overlapping satellite observations is critical for global monitoring environmental change assessments. We developed an empirical approach inter-calibration microwave brightness temperature (Tb) over land the Advanced Microwave Scanning Radiometer EOS (AMSR-E) 2 (AMSR2) using Tb Radiation Imager (MWRI). Double Differencing (DD) calculations revealed significant AMSR2 MWRI biases relative to AMSR-E. Pixel-wise...

Microwave Radiation Imager (MWRI) onboard the FengYun (FY)-3C satellite provides measurements of Earth's atmosphere and surface at 10.65, 18.7, 23.8, 36.5, 89.0 GHz with dual polarization. While FY MWRI data have been widely distributed to user community, their geolocation accuracy has not documented. In this paper, coastline inflection method is used estimate errors. Three coastal regions where brightness temperature exhibits a large contrast are selected for analysis. A total 720 points...

The Advanced Technology Microwave Sounder (ATMS) onboard the Suomi National Polar-orbiting Partnership (NPP) satellite is a total power radiometer and scans across track within range of <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$\pm 52.77^{\circ}$</tex></formula> from nadir. It has 22 channels measures microwave radiation at either quasi-vertical or quasi-horizontal polarization Earth's...

The retrieval of land surface emissivity from satellite passive microwave measurements often requires the knowledge various radiative components (e.g., atmospheric upwelling and downwelling radiation) contributed to measurements. Under a cloud-free condition, can be derived temperature water vapor, data. Thus, quality these auxiliary data sets directly affects accuracy. From an emission-based transfer equation, set relationships is study sensitivity errors brightness temperature,...

The Advanced Technology Microwave Sounder (ATMS) on board the Suomi National Polar-orbiting Partnership (NPP) satellite is a total power radiometer and scans across track with range of ±52.77° from nadir. It has 22 channels measures microwave radiation at either quasi-vertical or quasi-horizontal polarization Earth's atmosphere. ATMS scanning reflector made beryllium coated gold can have an emission due to surface roughness. During prelaunch phase, estimate emissivity was not explored. In...

The Suomi National Polar-orbiting Partnership (SNPP) satellite was launched on 28 October, 2011, and carries the Advanced Technology Microwave Sounder (ATMS) onboard. Currently, ATMS performance in orbit is very stable calibration parameters (e.g., noise accuracy) meet specifications. This study documents an error budget model its results for community reference. accuracy also verified with pitch maneuver observations of cold space. It shown that space at center positions are inconsistent...

The cold calibration count from the Advanced Technology Microwave Sounder (ATMS) space view increases when lunar radiation intrudes its antenna field of (FOV). This increase is referred to as contamination since not matched with specified brightness temperature 2.73 K. For ATMS, it found that elapse time intrusion (LI) and magnitude are channel dependent. If lunar-affected counts rejected in processing, a data gap can be shown at all channels. At ATMS channels 1 2, which have large FOV, LI...

Accurate global observations from space are critical for climate change study. However, atmospheric temperature trend derived spaceborne microwave instruments remains a subject of debate, due mainly to the uncertainty in characterizing long-term drift instrument calibration. Thus, highly stable target with well-known radiation is required evaluate calibration stability. This paper develops new model simulate lunar emission at frequencies, and then used monitoring stability Advanced...

In this paper, the Backus-Gilbert (B-G) method was used for conversion from Advanced Technology Microwave Sounder (ATMS) FOVs to AMSU-A FOVs. This provides not only an optimal combination of measurements within a specified region but also quantitative measure tradeoff between resolution and noise. Based on subpixel microwave antenna temperature simulation technique, ATMS observations at FOV size with 1.1° sampling interval are simulated. Errors remapping results were quantified by using...

For the quantitative applications of Suomi National Polar-orbiting Partnership (SNPP) Advanced Technology Microwave Sounder (ATMS), geolocation accuracy its sensor data records must be quantified during on-orbit operation.In this paper, a refined coastline inflection point method is used to evaluate SNPP ATMS.It disclosed that for ATMS, static error term with scan-angle-dependent feature dominant part among all sources.A mathematical model then developed convert in-track and cross-track...

A synthetic aperture radio/inverse radar (SAR/ISAR) coherent system model and inversion to image a target moving with an unknown constant velocity in stationary background are presented. The approach is based on recently developed modelling principle for SAR/ISAR imaging that utilizes the spatial Fourier decomposition of SAR data domain convert model's nonlinear phase functions into linear suitable computationally manageable inversion. It shown can be converted squint-mode problem where...

Microwave Radiation Imager (MWRI) onboard the FengYun (FYJ-3A/B satellites observes Earth atmosphere at 10.65, 18.7, 23.8, 36.5 and 89.0 GHz with each having dual polarization. Its calibration system is uniquely designed a main reflector viewing both cold hot targets. Two quasi-optical reflectors are used to reflect radiation from load space reflector. Soon after FY3b was successfully launched in November 2010, evaluation of on-orbit accuracy MWRI carried out. In this paper, CRTM simulate...

Abstract In this study we used the Level‐2 product of field‐aligned currents (FACs) from Swarm satellites, to check distribution characteristics small‐scale FACs (SSFACs) intense amplitude. Data applied covers 9 years December 2013 April 2023. Based on statistical analysis amplitude, SSFACs in is defined with amplitude larger than 20 μA/m 2 , which also by two orders well‐known large‐scale R1 and R2 (about 0.2 ). Such an indicates that it should play important role magnetosphere‐ionosphere...

In recent years, the study of microwave radiation from Moon’s surface has been interest to astronomy and remote sensing communities. Due stable geophysical properties surface, lunar is highly predictable can be accurately modeled, given sufficient observations reliable instruments. Specifically, for study, if International System Unit (SI) traceable Moon are available, thus used as an SI calibration reference instruments evaluate their accuracies assess long-term stabilities. Major...

Reported here are disk-integrated Moon surface microwave brightness temperature ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$Tb$ </tex-math></inline-formula> ) retrievals covering the frequency range of 23–183 GHz. Full observations obtained from advanced technology sounder (ATMS) onboard NOAA-20 satellite during a special spacecraft pitch–maneuver operation forms basis retrievals. Instrument...

Abstract The measurements from the Microwave Sounding Unit (MSU) and Advanced Unit-A (AMSU-A) on board NOAA polar-orbiting satellites have been extensively utilized for detecting atmospheric temperature trend during last several decades. After launch of Suomi National Polar-orbiting Partnership (Suomi-NPP) satellite 28 October 2011, MSU AMSU-A time series will be overlapping with Technology Sounder (ATMS) measurements. While ATMS inherited central frequency bandpass most sounding channels,...

One of the data fusion issues for observations from multiple space-borne microwave sensors is non-uniform spatial resolution. Although Backus-Gilbert Inversion (BGI) algorithm has long been used Advanced Technology Microwave Sounder (ATMS) antenna pattern matching, previous studies showed that it difficulty in accurate remapping coarser to finer observations. Since BGI tends enhance data's high frequency components including both information and noise, a challenge increase resolution while...

Abstract. The NOAA-20 satellite was successfully launched on 18 November 2017. It carries five key instruments, including the Advanced Technology Microwave Sounder (ATMS). On 31 January 2018, spacecraft performed a pitch-over maneuver operation, during which two-dimensional lunar scan observations were collected. In this study, technique has been developed by ATMS on-orbit geometric calibration accuracy can be validated based dataset. fully calibrated data are fitted to antenna pattern...

Passive microwave sounders provide the highest-impact observations ingested by major numerical weather prediction (NWP) forecast models. The Advanced Technology Microwave Sounder (ATMS), built Northrop Grumman, Azusa, CA, USA, is latest operational sounder series being launched United States to both temperature and water vapor soundings of atmosphere. first ATMS was on Suomi National Polar-orbiting Partnership (SNPP) satellite in 2011. This article focuses details on-orbit performance...

The Advanced Technology Microwave Sounder (ATMS) is a passive microwave radiometer for the current generation of polar-orbiting meteorological satellites operated by National Oceanic and Atmospheric Administration (NOAA). first two ATMS instruments are manifested onboard Suomi Polar-orbiting Partnership (S-NPP) NOAA-20 satellites. Several critical changes have been made to operational calibration algorithm since March 2017. processing has revised from Rayleigh–Jeans approximated full...

Recently, the advanced coastline inflection point method (CIPSD) was developed to retrieve instrument boresight pointing error of Suomi National Polar-orbiting Partnership (SNPP) Advanced Technology Microwave Sounder (ATMS). Because use mathematical model and separate-domain technique, this algorithm can in terms Euler angles efficiently. But retrieval uncertainty yaw is larger than that other two due limitation method. This paper thoroughly investigates phenomenon asynchrony between serial...

The research on reentrant hybrid flow shop scheduling problem is of great significance for the semiconductor and medical fields. Taking automatic chemiluminescence immunoassay analyzer (ACIA) as an example, this paper establishes ACIA model with optimization objective minimizing maximum completion time. In addition, article introduces dynamic disturbance factor strategy somersault foraging to improve traditional grey wolf algorithm, enhancing its global search ability convergence speed....