[MIRA] MIRA Webinar Monday, 21 UTC, Dr. Willem Marais

Fri Dec 1 04:50:10 PST 2023

Friends of MIRA,

A friendly reminder that Dr. Willem Marais will be our webinar speaker on Monday at 21 UTC. That’s 8 am in Melbourne, 3pm for Willem in Wisconsin, 4pm on the US East Coast, and 10pm in central Europe. As usual, we will record the webinar and make it available at https://science-data.larc.nasa.gov/MIRA-WG/Morphing-MIRA-Webinar-Series/ afterwards.

Hope to see you there!

Greg

Link to the webinar:

https://gcc02.safelinks.protection.outlook.com/ap/t-59584e83/?url=https%3A%2F%2Fteams.microsoft.com%2Fl%2Fmeetup-join%2F19%253ameeting_YzVhMGFiZGQtZjE1Ni00MjExLTlkMGYtOWFjNjBhMDI3ZGI3%2540thread.v2%2F0%3Fcontext%3D%257b%2522Tid%2522%253a%25227005d458-45be-48ae-8140-d43da96dd17b%2522%252c%2522Oid%2522%253a%2522408095f5-ff81-4889-a108-9cd9cd752d5c%2522%257d&data=05%7C01%7Cmira%40espo.nasa.gov%7C355c4a854151465c875208dbf26c0f4c%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C638370318147158665%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fu3fV8ozRTXD3seYRW9EVZ2uTFzStL6TYVScosIPORE%3D&reserved=0<https://gcc02.safelinks.protection.outlook.com/ap/t-59584e83/?url=https%3A%2F%2Fteams.microsoft.com%2Fl%2Fmeetup-join%2F19%253ameeting_YzVhMGFiZGQtZjE1Ni00MjExLTlkMGYtOWFjNjBhMDI3ZGI3%2540thread.v2%2F0%3Fcontext%3D%257b%2522Tid%2522%253a%25227005d458-45be-48ae-8140-d43da96dd17b%2522%252c%2522Oid%2522%253a%2522408095f5-ff81-4889-a108-9cd9cd752d5c%2522%257d&data=05%7C01%7Cmira%40espo.nasa.gov%7C355c4a854151465c875208dbf26c0f4c%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C638370318147314805%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Z1Lv75QInRsic0PR%2FHnKGAlCJ%2FuWDSRM9B83VeoWAY4%3D&reserved=0>

High image resolution CALIOP aerosol extinction denoising: Constructive insights for future space-based missions.

Dr. Willem Marais

University of Wisconsin-Madison, USA

Currently the standard noise reduction method for satellite based lidar measurements, such as CALIOP, is to average over multiple column measurements. Consequently, for non-uniform aerosols and clouds non-linear biases are introduced in the measured extinction coefficient (coeff.) due to the non-linearity of the single scatter lidar equation. For example, in order to measure daytime aerosol extinction coefficients the CALIOP measurements have to be down-sampled from 1/3 kilometer to 80 km horizontal resolution. In this presentation we report on the progress that has been made in developing a higher image resolution CALIOP extinction inference (i.e., denoising) methodology. Specifically, the proposed inference method exploits the underlying coherent spatial-temporal extinction image structure which can be separated from the random detector and solar background radiation noise; the inference is achieved through a theoretically supported mathematical optimization framework in which a cost function is minimized that includes a photon detector noise model and the single scatter lidar equation. In the presentation we will report on the challenges that had to be confronted, such as ill-defined noise sources which can cause unintended inference problems. What will be reported in this presentation will provide constructive insights into denoising future space-based lidar observations.

Bio: Dr. Willem Marais received his PhD at ECE University of Wisconsin Madison in 2017. He is specialized in developing lidar and imager denoising and inference methodologies, and enhancing imager products through machine learning methods.

----
Gregory L  Schuster, PhD
NASA Langley Research Center
Mail Stop 420
Hampton, VA 23681

Models, In situ, and Remote sensing of Aerosols (MIRA) webpage:
https://science.larc.nasa.gov/mira-wg/

Subscribe to the Models, In situ, and Remote sensing of Aerosols (MIRA) news list at
https://espo.nasa.gov/lists/listinfo/mira

and post relevant MIRA news (moderated) by sending email to
mira at espo.nasa.gov<mailto:mira at espo.nasa.gov>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://espo.nasa.gov/pipermail/mira/attachments/20231201/f7dfcf73/attachment-0001.htm>