************************************************************************ IERS Message No. 376 March 18, 2019 ************************************************************************ New ESMGFZ product servers Dear colleagues, The IERS GGFC Associated Product Centre at GFZ has established a new database-based server for its ESMGFZ products: http://esmdata.gfz-potsdam.de:8080 From this new server, you can download single data files or data sets using HTTP requests instead of FTP commands. HTTP request can be send by any browser or via the 'curl' and 'wget' commands in LINUX. Datasets and files are now organized in a database using folders and entries that point to a single data file or a (sub)set of aggregated data files. FTP access: The new ESMGFZ product server is also accessible via FTP: ftp://esmdata.gfz-potsdam.de Data on the old FTP server is temporarily available at ftp://ig2-dmz.gfz-potsdam.de/EAM/FTP/ , but this server will be shut down at the end of April 2019. New dataset SLAM: In addition to the Earth's rotation excitation functions (EAM: effective angular momentum functions) for atmosphere (AAM), ocean (OAM), continental hydrology (HAM), we provide sea-level angular momentum functions (SLAM) to consider the seasonal water mass exchange between land, atmosphere, and ocean. SLAM is calculated from the barystatic sea-level variation that balances the atmospheric and continental water storage in the ocean. The barystatic sea-level variation is derived by solving the sea-level equation thereby considering loading and self-attraction effects. SLAM is the missing part to close the rotation excitation budget for a mass conserving Earth. Help on URL commands: Please have a look on the page http://esmdata.gfz-potsdam.de:8080/repository/entry/show/Home/ Elastic+Surface+Loading/Documents/URL+commands [note the line wrap in this link] to construct your own download URL commands or view and copy the URL address shown in your browser when searching for data. Extract time series / Plots: The new server allows for the extraction and plot of timeseries from the gridded data sets (loading products). Please note that timeseries extraction using the browser is done by nearest neighbour interpolation. You can also try the new script , which performs bilinear interpolation from the 4 surrounding gridcells to the station location. The script has to be executed on your local machine. It downloads the 4 timeseries around the station location and performs bilinear interpolation. Note: The server is now running in a standard configuration. It may take some time to extract timeseries. We will observe the server load in the next months to detect any bottlenecks, in order to improve the performance step by step. Update Info: We corrected the script for the use of option -m. The script determines if the station is located at the coastline from looking at 4 four surrounding gridcells in the land/water mask file. So far the 4 gridcells neighbouring the central gridcell, containing the station, in diagonal direction were used. We now changed this to the block of 4 gridcells that directly surround the station location. Please let us know about your experience with the new data server and do not hesitate to inform us about any problems. With best regards, Robert Dill ************************************************************************ IERS Messages are edited and distributed by the IERS Central Bureau. If not stated otherwise, the IERS is only the distributor of the message and is not responsible for its content. To submit texts for distribution, please write to . To subscribe or unsubscribe, please create an IERS account or modify it: https://www.iers.org/Login/Login/EN/login_node.html or write to . Archives: http://www.iers.org/Messages/ ************************************************************************