Ling in the middle and low latitudes really should be additional investigated.Author Contributions: Data curation,

Ling in the middle and low latitudes really should be additional investigated.Author Contributions: Data curation, H.L.; formal evaluation, Y.M.; investigation, G.X.; methodology, Y.M.; computer software, Z.L.; validation, H.L.; writing–original draft, Y.M.; writing–review and editing, Z.L. All authors have read and agreed for the published version of your manuscript. Funding: The project was financially supported by the Guangdong Simple and Applied Simple Study Kumbicin C medchemexpress Foundation (Nos. 2021A1515012600) and the Shenzhen Science and Technologies System (Nos. KQTD20180410161218820). Data Availability Statement: ECMWF reanalysis ADT-OH Epigenetic Reader Domain information can be obtained from the following web site: https://apps.ecmwf.int/datasets/ (accessed on 29 April 2021). The meteorological data of sounding stations is often downloaded in the following hyperlink: ftp://ftp.ncdc.noaa.gov/pub/data/igra/ (accessed on 29 April 2021). The IGS item information files is often downloaded from the following internet site: ftp://geodesy.noaa.gov/ (accessed on 29 April 2021). Acknowledgments: The authors would like to thank the ECMWF and Integrated Global Radiosonde Archive (IGRA) for providing the meteorological data and also the IGS for delivering the tropospheric delay products of IGS stations. Conflicts of Interest: The authors declare no conflict of interest.Appendix A For the reader to be able to replicate the models are described, the data employed in every single stage and also the method of constructing the model are further described, as shown in Figure A1. The modeling procedure in detail is as follows:Remote Sens. 2021, 13,16 ofFirst, based on ERA-5 information from 2015 to 2019, the ZTD worth is solved by Equation (1). Thinking of the influence of altitude on tropospheric delay, the tropospheric delay grid information is uniformly corrected for the grid information according to imply sea level by Equation (5), such as ZTD0 as well as the corresponding altitude correction coefficient . Then, depending on the worldwide grid information (ZTD0 and ), the worldwide tropospheric spherical harmonic coefficient set (SH_set) is established through the spherical harmonic function (Equation (6)). Last, we decompose the SH_set by the EOF method (Equations (eight) and (9)) to get the basis vectors (U) and corresponding coefficients (Ai (h)). The EGtrop model is established by time fitting (Equation (12)) the EOF coefficients (Ai (h)). The reconstruction of the SH coefficients might be realized by utilizing Equation (7). Only by giving doy and Hod, the user can get tropospheric SH coefficients. Then, the global tropospheric delay depending on the imply sea level might be obtained by using the SH function and coefficients. The worldwide altitude correction coefficient is obtained by exactly the same technique. Ultimately, the ZTD at the specified position is obtained by Equation (five).Figure A1. Flowchart of EGtrop model building.Remote Sens. 2021, 13,17 of
remote sensingReviewHigh-Precision 3D Reconstruction for Small-to-Medium-Sized Objects Using Line-Structured Light Scanning: A ReviewBin Cui , Wei Tao and Hui Zhao Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; [email protected] (B.C.); [email protected] (W.T.) Correspondence: [email protected]; Tel.: +86-021-3420-Abstract: Three-dimensional reconstruction technologies has demonstrated broad application prospective inside the industrial, construction, medical, forestry, agricultural, and pastural sectors within the final couple of years. High-quality digital point cloud info exists to help researchers to understand objects and.