Welcome to the NCPA G2S Request System

This interface allows the user to request subsets of data from the NCPA G2S Archive. You will be asked for the date(s) and location(s) for which to extract data, and the results will be calculated and a download link sent via email. Completed requests will be held on the server for a minimum of 14 days, after which they are subject to deletion. Users are subject to a rolling limit of 10MB of requested data per 2-week period (a single atmospheric profile at a single location in text form is approximately 170KB; binary formats are considerably smaller per profile).

NOTE: This site is also occasionally under ACTIVE DEVELOPMENT. Unexpected interface behavior may be observed at such times. No warranty is made for accuracy of data products. Data requests are not private.

Please contact Claus Hetzer at claus@olemiss.edu with any questions.

NEW! A command-line interface is now available that offers synchronous responses with no registration required. Download it at https://github.com/chetzer-ncpa/ncpag2s-clc.

View current holdings in a new window/tab

Citing G2S

If you use data from this interface in a published work, we kindly request that you cite both this page and the G2S model itself. The NCPA-G2S interface can be cited as:

• Hetzer, C.H., Drob, D.P., and Zabel, K. (2019). The NCPA-G2S request system. https://g2s.ncpa.olemiss.edu. Accessed YYYY-MM-DD.

The G2S model is described in:

• Drob, D.P., Picone, J.M., and Garcés (2003). Global Morphology of infrasound propagation. Journal of Geophysical Research 108 (D21), 4680. doi:10.1029/2002JD003307.
• Drob, D.P., Garcés, M., Hedlin, M., and Brachet, N. (2010). The temporal morphology of infrasound propagation. Pure and Applied Geophysics 167 (4-5), 437-453. doi:10.1007/s00024-010-0080-6.

Data and Model Sources for NCPA-G2S

NCPA-G2S uses inputs from the following data sources and models:

• National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. 2015, updated daily. NCEP GFS 0.25 Degree Global Forecast Grids. National Center for Atmospheric Research, Computational and Information Systems Laboratory. doi:10.5065/D65D8PWK.
• Rienecker, M.M., Suarez, M.J., Todling, R., Bacmeister, J., et al. (2008). The GEOS-5 Data Assimilation System – Documentation of Versions 5.0.1, 5.1.0, and 5.2.0. NASA Technical Report Series on Global Modeling and Data Assimilation, 27, NASA Technical Report NASA/TM-2008-104606.
• Bosilovich, M., Akella, S., Coy, L., Cullather, et al. (2015) Merra-2: initial evaluation of the climate. NASA Technical Report Series on Global Modeling and Data Assimilation, 43, NASA Technical Report NASA/TM-2015 104606.
• Drob, D.P., Emmert, J.T., Meriwether, J.W., Makela, J.J., et al. (2015). An update to the horizontal wind model (HWM): the quiet time thermosphere. Earth Space Science 2 (7), 301 – 319.
• Picone, J., Hedin, A., Drob, D.P., Aikin, A. (2002). NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues. Journal of Geophysical Research Space Physics, 107 (A12).