Bye Bye NOGAPS, hello NAVGEMS

Sponge Bob

The cutover from NOGAPS to NAVGEM is near and NOGAPS will disappear in Q1 2013.

http://www.usgodae.org/navgem.html

[FONT=Georgia, Arial, Verdana] Naval Research Lab (NRL) Monterey has been working on a new state of the science global model to take Navy modeling to the next generation.

Transitioning to the Navy Global Environmental Model (NAVGEM) is already underway here at Fleet Numerical. In order to ensure the transition is as smooth as possible for our customers, we are hosting a realtime NAVGEM data feed available via our beta CAGIPS and METCAST service. We are making this data available to customers so they can begin testing software/applications with the NAVGEM data sets to verify this transition will not negatively impact any processes/applications you may be running. To further minimize impacts to any of our customer's downstream applications, the NAVGEM grid resolution and format will remain the same as the existing NOGAPS data sets; however, the file names and data subscriptions will change during this transition.[/FONT]

http://nrc58.nas.edu/RAPLab10/Opportunity/Opportunity.aspx?LabCode=64&ROPCD=641589&RONum=B5734

The Navy Operational Global Atmospheric Prediction System (NOGAPS) is DOD’s current global NWP system. NRL is in the process of replacing NOGAPS with a next-generation NWP system known as the Navy Global Environmental Model (NAVGEM).

NRL has also developed an advanced-level physics high-altitude (ALPHA) prototype of NOGAPS that extends both the global forecast model and the NRL Atmospheric Variational Data Assimilation System (NAVDAS) to ~100 km altitude, features now being integrated into the new NAVGEM system. The Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS®) is the Navy’s regional mesoscale NWP model. New work seeks to extend COAMPS forecasts to higher near-space altitudes by leveraging off of the global analysis and boundary conditions fields now being provided by the NOGAPS/NAVGEM ALPHA capabilities.

Parallel work is upgrading the global forecast model physics to provide a tangent-linear capability and the high-altitude NAVDAS component from the current three-dimensional variational (3DVAR) algorithm to NRL’s new 4DVAR-based system known as NAVDAS-AR (Accelerated Representor), again within the new NAVGEM environment.

Finally, for the curious.

[FONT=Georgia, Arial, Verdana]Instructions on how to access this data, examples of the new data headers and a "FAQ"/general information page are available on FNMOC's NIPR/SIPR webpage:

https://nepoc.oceanography.navy.mil/portal/web/fnmoc/home
http://nepoc.oceanography.navy.smil.mil/portal/web/fnmoc/home[/FONT]

Danno

Ah, NOGAPS... the Blonde model!