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STAR Seminars

This page lists upcoming STAR Science Forum seminars. Presentation materials for seminars will be posted with each scheduled talk when available.

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All seminar times are given in Eastern Time

29 January 2020

Title: Exploring Instrument Hosting Potentials from Emerging Internet Platforms
Presenter(s): Likun Wang, Riverside Technology, inc
Date & Time: 29 January 2020
11:30 am - 12:30 pm ET
Location: NCWCP - Large Conf Rm - 2552-2553

STAR Science Seminars
Likun Wang, Riverside Technology, inc
Co-Authors: LingLiu, Katherine Lukens, Kayo Ide, Kevin Garrett, Sid Boukabara

STAR Science Seminar Series

Remote Access:
Event Number:     904 040 583   
Password: STARSeminar
Event address for attendees:

+1-415-527-5035 US Toll
Access code: 904 040 583


The NOAA global observing system (GOS) contains a large variety of observing platforms, including geostationary and polar-orbiting satellites, radiosonde,aircraft, surface stations, ships, buoys, etc. Despite the comprehensiveness of the observing system, many critical gaps exist in spatial/temporal coverage,spectral coverage, and resolution. To address these gaps, the NOAA/NESDIS Technology Maturation Program funded one of projects to explore use of emerging internet platforms (such as Loon high altitude balloons and SpaceX StarLink Satellites) for hosting remote sensing instruments. This talk summarizes feasibility assessment on potentials payload hosting opportunities that can benefit NOAA GOS system, which mainly focuses on Loon platforms and also extends to recent SpaceX StarLink constellations.  

First, the Loon platform characteristics and flight dynamics are comprehensively surveyed to explore the capability and limitation for Loon as a hosting platform.  Second, by comparing GOES-16 Advanced Baseline Imager (ABI) with collocated Loon infrared thermometer measurements,we demonstrate that the Loon platform can served as a validation platform for future NOAA satellite sensors. Third, through simulation studies, observational geometry (e.g., footprint size, swath width, pointing accuracy) and weighting functions are studied for the scenarios that the Loon platform can host passive microwave instruments. More importantly, we demonstrate that balloon-based GPS radio occultation (RO) measurements can be complementary to current satellite based GPSRO systems. Efforts have been devoted to develop the capability of simulating the GPSRO slant path and bending angle from the balloon platform at~20 km, utilizing current constellation of Global Navigation Satellite Systems.Based on the calculations, the sampling characteristics and spatial and temporal coverage as well as the advantages and disadvantages are discussed.Based on this, the Observing System Simulation Experiment (OSSE) is designed to assess possible impacts on Global Forecasting System (GFS) forecasting capabilities by adding balloon-based GPSRO observations. The impacts are demonstrated and compared to those from space-based GPSRO observations. Finally,SpaceX StarLink constellation are simulated and potential hosting opportunities are discussed.


Dr. Likun Wang is now working in NOAA/NESDIS/STAR as a contract scientist employed by Riverside Technology, inc for Research Technology Maturation for the Exploitation of Emerging Technologies (RTMEE) Contract, including near space payload hosting platform assessment, Artificial Intelligence (AI) technology demonstration, and geostationary sounder proxy data  simulations. With more than 15 years of progressive working experiences of NOAA's satellite sensors, Dr. Likun Wang has been responsible for the pre- and post-launch calibration testing data analysis, inter-calibration for post-launch instrument monitoring and assessment, ground processing software development, configuration and calibration parameter refining, and new algorithm design and integration. He currently serves the chair of World Meteorological Organization (WMO) sponsored Global Space-based Inter-Calibration System (GSICS) infrared sensor working group. Likun Wang received his B.S. degree in atmospheric sciences and the M.S. degree in meteorology from Peking University, Beijing, China, in 1996 and 1999, respectively, and the Ph.D. degree in atmospheric sciences from University of Alaska Fairbanks, in 2004.

Stacy Bunin,
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