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...

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...

The evolution of galaxies is largely affected by exchanging material with their close environment, the circumgalactic medium (CGM). In this work, we investigate CGM and interstellar (ISM) bright central galaxy (BCG) cluster, MACS1931−26 at z ∼ 0.35. We detected [CI](2−1), 12 CO(1−0), CO(7−6) emission lines APEX 12-m NRO 45-m telescopes. complemented these single-dish observations CO(3−2), CO(4−3) ALMA interferometric data inferred cold molecular hydrogen physical properties. Using a modified...

One of the limitations in using spaceborne, microwave radiometer data for atmospheric remote sensing is nonuniform spatial resolution. Remapping algorithms can be applied to ameliorate this limitation. In paper, two remapping algorithms, Backus–Gilbert inversion (BGI) technique and filter algorithm (AFA), widely used operational preprocessing Advanced Technology Microwave Sounder (ATMS), are investigated. The compared simulations actual ATMS data. Results show that both effectively enhance...

Anomaly detection based on telemetry data can improve the operating safety for spacecrafts. Most of anomaly methods in this domain are Euclidean distance similarity measure monitoring parameters. However, has many limitations and may affect detecting performance. Therefore, improved measures combined applied analysis. An framework with different presented multiple parameters satellite paper. Then, proposed approach k-Nearest Neighbor (KNN) classification into actual data. Experimental...

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...

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...

Abstract A new multilevel detection scheme for cloud tomography is developed. This solves problems intrinsic to conventional single-level detection, such as the lateral boundary problem and low accuracy of liquid water content (LWC) retrieval clouds without distinct cores. Sensitivity studies show that can significantly enhance well posedness inverse increases retrieval. These improvements are achieved not only with cores but also weak or no cores, which difficult accurately reconstruct...

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...

We develop a new gridded monthly mean climatology (MMC) in the upper troposphere and lower stratosphere (UTLS) from 2006 to 2023 using dry temperature profiles multiple Global Navigation Satellite System (GNSS) Radio Occultation (RO) missions processed by GNSS RO Science Data Center (SDC) at NOAA for Applications Research (STAR). The include Formosa Mission 3/Constellation Observing Meteorology, Ionosphere, Climate (COSMIC-1), 7/ COSMIC-2, SPIRE, Meteorological Operational satellite...

The evolution of galaxies is largely affected by exchanging material with their close environment, the circumgalactic medium (CGM). In this work, we investigate CGM and interstellar (ISM) bright central galaxy (BCG) cluster, MACS1931-26 at z~0.35. We detected [CI](2-1), CO(1-0), CO(7-6) emission lines APEX 12-m NRO 45-m telescopes. complemented these single-dish observations CO(3-2), CO(4-3) ALMA interferometric data inferred cold molecular hydrogen physical properties. Using a modified...

Abstract A fast inverse algorithm based on the half-V cycle scheme (HV) of multigrid technique is developed for cloud tomography. Fourier analysis shows that slow convergence problem caused by smoothing property iterative can be effectively alleviated in HV performing iterations from coarsest to finest grid. In this way, resolvable scales information contained observations retrieved efficiently coarser grid level and unresolvable are left as errors finer level. Numerical simulations indicate...

One of the limitations in using spaceborne, microwave radiometer data for atmospheric remote sensing is coarse spatial resolution at low frequencies. Backus-Gilbert inversion algorithm widely used enhancement. However, enhancement achieved expense increase noise. To suppress noise reconstructed data, a new adaptive window method proposed. Compared to fixed adopted previous studies, capable reducing 1/10 induced by while keeping similar degree

Accurate instrument mounting matrix information is significant for geolocation algorithm to reach a high on orbit accuracy. In this study, an integrated satellite-ground error model was proposed, based which the can be accurately rebuilt. This method has been successfully applied SNPP ATMS on-orbit geolocation, results show that reduced by 34%.

Rotating machinery is widely used in modern industrial technology. Timely diagnosis of faults rotating equipment great significance to maintain the reliability and safety whole system. Since development fault technology, there have been many methods that can be applied machinery, these achieved good results. However, cannot balance relationship between diagnostic accuracy timeliness very well, require high computing capabilities device, which not conducive algorithm deployment on hardware...

The paper presents the development of sinusoidally grooved polarizers for electron cyclotron resonance heating (ECRH) systems in HL-2A tokamak. polarizer groove shape was designed according to a sinusoidal function with period p = 0.48λ and depth d 0.5λ. Here, λ is wavelength, whose value 4.41 mm. low-power test results performance are agreement numerical calculation based on integral method developed vector theories diffraction gratings. High-power experiments reveal that 340 kW high-power...

With the continuing growth in influence of near surface geophysics, research subsurface structure is great significance. Geophysical imaging one efficient computer tools that can be applied. This paper utilize inversion potential field data to do imaging. Here, gravity and magnetic are inverted together with structural coupled algorithm. The subspace (model space) divided into a set rectangular cells by an orthogonal 2D mesh assume constant property (density susceptibility) value within each...

To improve the algorithm of structural coupled imaging technique, a method using damped least squares is adopted to calculate component model updates instead truncated SVD solution, which produces multi-physical coupling images with high efficiency. A synthetic test shows better performance and cross plots reveal convergence characteristic, indicates potential improved algorithm.

Summary In a Kimberly exploration project, which is very hard to locate the real target, with prior information from 1-D inversion of typical sites, we build 3-D background model calculate AMT response influenced by topography and non-homogeneous near-surface, then use correct measured data's impedance phase invariant. The corrected invariant terms be powerful tool rule out misrepresentative abnormality on traditional 2-D inversion. All these qualitative analysis give better understanding...