CURRENT PROJECTS

Relevant Projects:

1.      Active-Passive Coexistence research. (SWIFT, NSF), ..... (2022-present)

·       Passive sensing and wireless communication spectrum coexistence,

·       SDR-based 5G -- L-band Radiometer test-bed,

·       Over the air (OTA) 5G transmission in anechoic chamber,

·       Radio Frequency interference (RFI) impact on radiometric response,

2.       High-resolution subfield scale surface soil moisture retrieval with UAS-based GNSS-R system for Precision agriculture. (NSF), ..... (05/2020- present)

·       UAS-based GNSS-R system for high-resolution reflectivity estimation,

·       Field scale surface soil moisture correlation with in-situ data,

·       High -resolution surface soil moisture map for precision agriculture,

3.      UGV-based GNSS-T for vegetation optical depth (VOD) estimation for SMAP satellite vegetation masking estimate. (FINESST), ..... (2020-present)

·       UGV-based GNSS-T system development,

·       High-resolution VOD estimation for forested terrain,

·       Large scale L-VOD correlation with UAS-based LiDAR point cloud

4.      UAS-based L-band radiometer design and development for high-resolution sub-filed-scale brightness temperature measurement. (NSF), ..... (2021- 2023)

·       UAS-based radiometer development,

·       L-band radiometer for precision agriculture,

·       Field-scale radiometric brightness temperature estimation,

5.      Fusion of Reflected GPS Signals with Multispectral Imagery to Estimate Soil Moisture at Sub-field Scale from Small UAS platforms. (USDA), ..... (2019- 2022)

·       High-resolution soil moisture estimation for precision agriculture,

·       ML algorithm for soil moisture estimation map,

·       Fusing multispectral image with GNSS-R for vegetation correction,

6.      Integration of Smartphones into Small Unmanned Aircraft Systems to Sense Water in Soil by Using Reflected GPS Signals. (USDA), ..... (2019-2021)

·       Used smartphones as GNSS-R receiver,

·       UAS-based smartphone GNSS-R receiver for reflectivity estimation,

·       Developed spinning smartphone system for antenna correction,

·       Developed spinning smartphone-based ground station for reference data,

7.      Design and build UASs and UGVs for small, medium, and heavy payloads (under 55lbs) to carry GNSS receiver instruments for sub-filed scale soil moisture and VOD retrieval system, ..... (2019-Present)

·       Built 15 UAS platform of different sizes and payload capacity,

·       Built 7 UGV platform for different field experiments,

·       Built payload housing system for UASs and UGVs for field data acquisition,