1. Lidar Radar Open Software Environment Mike Dixon, Wen-Chau Lee Mike Daniels, Charlie Martin Steve Cohn, Bill Brown Earth Observing Laboratory (EOL) National Center for Atmospheric Research (NCAR) Boulder, Colorado EOL External Advisory Committee 8 November 2012 LROSE NCAR is supported by the National Science Foundation.

2. What problem are we trying to solve? We support users in the scientific community, but we are finding it difficult to provide good quality support for aging legacy applications. The scientific community has needs that are not supported by our current software. We have a large code base of software, of varying ages and maintainability. We have inherited data formats that are not optimal for scientific data exchange. Spol-Ka at DYNAMO Maldive Islands

3. What is LROSE? LROSE is an NSF-backed project to develop common software for the LIDAR, RADAR and PROFILER community. It is based on collaborative, open source development. The code would be freely available on the web. The core: developed by NCAR/EOL, largely based on existing code. Algorithms and analysis tools: developed and supported by the community. Data would be stored in portable data formats, based on UNIDATA NetCDF. SPOL Particle ID algorithm DYNAMO 2011/10/16

4. Supported instruments LROSE would support many of the LAOF instruments: Spol-Ka HCRWyoming cloud radar DOWs CSU/CHILL Eldora HSRL 915 MHz profilers449 MHz profilers Wyoming cloud LIDAR DIAL HSRL in GV, TORERO, 2012

5. Collaboration LROSE is an Open Source project. Cost reduction and efficiency will be achieved through collaboration with other organizations. UNIDATA NOAA/NSSL DOE/ARM Universities NCAR/RAL NASA NWS/ROC International: e.g. BALTRAD Europe BOM Australia CSWR CSWR DOW3 ROTATE-2004, Harper, Kansas, May 2004

6. LROSE Components Data exchange formats (EOL/UNIDATA) Files and data streams in standardized formats – mostly NetCDF using the Climate and Forecasting (CF) conventions, suitable for exporting to models for data assimilation. Core applications (EOL) Applications that provide the ‘glue’ to hold the system together. Algorithms and analysis tools (Community) Analysis, research, generating derived products. Displays (EOL/UNIDATA) For data visualization, and editing as appropriate. HSRL backscatter, TORERO, 2012/01/12

8. Status A white-paper proposal was developed at EOL, and was informally discussed with NSF to gauge their level of interest. NSF approved of the idea in principle, and provided some seed funding to EOL to allow initial work to commence over a period of 6 months or so. The white paper has been sent out to 81 members of the community via email, to solicit comments and feedback. So far we have received responses from 20 of the 81 requests. Comments have been generally positive, with some constructive suggestions for improvements to the white paper. The white paper, along with the community comments, will be discussed in a dedicated session at the NSF radar workshop in late November. XPROF profiler display 2012/09/07

9. Level of effort We have proposed a 3-year development period with the following level of effort: Software engineering: 2.5 FTE, total 90 person months Science support: 0.3 FTE, total 11 person months Management support: 0.2 FTE, total 7 person months HCR on the GV

10. NCAR is supported by the National Science Foundation. Thank you Eldora on the NRL P3