Sciences and Exploration Directorate

Philippe Xu



Org Code: 619

Mail Code: 619
Greenbelt, MD 20771


Brief Bio

Philippe received his Master degree in Solid State Physics in 1991 from Université de Sherbrooke in Canada, and completed his PhD in Remote Sensing academic program in CARTEL from the same University.  

Before his graduation, in 1996 he started a Remote Sensing Laboratory in a Research Center of Agriculture and Agri-Food Canada (AAFC, from 1996-1998).  He served as Remote Sensing Applications Analyst in Canada Space Agency in Montreal (1999-2000) before he moved to USA. 

From 2001 to 2006, he worked as contracted Physical Scientist in STAR/NOAA, conducting the OMPS-LP algorithms reviews and evaluations as an adviser member in Ozone Operation Algorith TEAM (OAT) in NPP/NPOESS program. 

From 2007 to 2008, he was a Lead Engineer of Operation Research in Algorithms Division at IPO of NPOESS program.  His research journey with NASA started in early 2009 with GMAO/GSFC in Atmosphere Data Assimilation, specifically for OMPS Limb Profiler Ozone and MLS Ozone Assimilation.  Currently, Philippe is working with OMPS-LP science and operation team for Ozone Mapping and Profile Suite Limb Profiler project.


Research Interests

Limb measurements, ozone profile retrievals, Radiative Transfer Model, Stratosphere Aerosol profiles, NO2, etc.

Earth Science: Ozone

All L1B and L2 algorithms tune up for Ozone Mapping and Profiler Suite Limb Profiler.

Current Projects

OMPS/LP RTM and retrieval algorithms testing, integration and improvements.


OMPS/LP Ozone and trace gas retrievals algorithms studies covers: ozone UV and VIS retrieval, stratisphere aerosol extinction profile retrieval refinement, surface reflectance and cloud top retrieval, instrument pointing retrievals investigation, wavelength shift correction, radiance validation, straylight removal.



Kramarova, N. A., P. K. Bhartia, G. Jaross, et al. L. Moy, P. Xu, Z. Chen, M. DeLand, L. Froidevaux, N. Livesey, D. Degenstein, A. Bourassa, K. A. Walker, and P. Sheese. 2018. Validation of ozone profile retrievals derived from the OMPS LP version 2.5 algorithm against correlative satellite measurements Atmospheric Measurement Techniques 11 (5): 2837-2861 [10.5194/amt-11-2837-2018]

Moy, L., P. K. Bhartia, G. Jaross, et al. R. Loughman, N. Kramarova, Z. Chen, G. Taha, G. Chen, and P. Xu. 2017. Altitude registration of limb-scattered radiation Atmospheric Measurement Techniques 10 (1): 167-178 [10.5194/amt-10-167-2017]

Jaross, G. R., P. K. Bhartia, G. Chen, et al. M. E. Kowitt, M. E. Haken, Z. Chen, Q. Xu, J. A. Warner, and T. J. Kelly. 2014. OMPS Limb Profiler instrument performance assessment J. Geophys. Res. Atmos. 119 (7): 4399-4412 [10.1002/2013JD020482]

Kramarova, N. A., E. R. Nash, P. A. Newman, et al. P. K. Bhartia, R. D. McPeters, D. F. Rault, C. J. Seftor, P. Q. Xu, and G. J. Labow. 2014. Measuring the Antarctic ozone hole with the new Ozone Mapping and Profiler Suite (OMPS) Atmos. Chem. Phys. 14 (5): 2353-2361 [10.5194/acp-14-2353-2014]

Talks, Presentations and Posters


October 22, 2014

Release 2 data products from the Ozone Mapping and Profiler Suite (OMPS) Limb Profiler