REMOTE SENSING OF THE PLANETARY BOUNDARY LAYER USING NEXT-GENERATION HYPERSPECTRAL MICROWAVE SOUNDERS: HIGH-FREQUENCY MICROWAVE AND MILLIMETER-WAVE RADIOMETER – HIGH DEFINITION (HAMMR-HD)
Marzo 25, 2026EXPLORING THE POTENTIAL FOR REAL-TIME FORECASTING OF LOW-VISIBILITY EVENTS AT ACTRIS RADO–BUCHAREST FACILITY, ROMANIA
Marzo 25, 2026N. Bliankinshtein1, G. Resendes-Awada1, K. Bala1, S. Xu2, P. Gabriel3, Y. Huang2, C. Nguyen1, O. Auriacombe4, D. Schuettemeyer5
1National Research Council Canada, 2McGill University, 3Horizon Science and Technology, 4AAC Omnisys, 5European Space Agency
The High-Spectral Resolution Airborne Microwave Sounder (HiSRAMS) is one of the first sensors of its kind that was developed and flight-tested on an airborne platform [1]. The system consists of two compact hyperspectral radiometers [2], one at 54 GHz and the other at 183 GHz, that were extensively validated in clear sky conditions using forward and inverse radiative transfer models [3,4]. HiSRAMS was also tested in presence of warm clouds [5] and more recently in more complex cloudy conditions during the WHAFFFERS flight campaign [6].
Throughout the system development, the team discovered many artifacts in the observed data that necessitated specific, targeted corrections. Some of the identified issues were specific to a hyperspectral system and previously not as common among conventional radiometers [7]. Others were present because of design constraints, as HiSRAMS was made to be sufficiently small and lightweight to fly on a wingtip of the NRC Convair-580 research aircraft.
A particular artifact that is addressed in this work is the state-dependent bias of HiSRAMS brightness temperatures [8] that appears due to a wide range of operating conditions (from -40 deg C to +40 deg C) and due to imperfections of the calibration subsystem. This presentation will detail findings from recent calibrations tests with external calibration targets and from wintertime flight data, and suggest possible mitigations.
References
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Bliankinshtein, N., Liu, L., Gabriel, P., Xu, S., Bala, K., Wolde, M., Huang, Y., Auriacombe, O., Krus, M. and Angevain, J.C., 2023, July. Airborne validation of HiSRAMS atmospheric soundings. In IGARSS 2023-2023 IEEE International Geoscience and Remote Sensing Symposium (pp. 4372-4375). IEEE.
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Auriacombe, O., Bliankinshtein, N., Gabriel, P., Wolde, M., Huang, Y., Embretsén, J., Krus, M., Olvhammar, S. and Angevain, J.C., 2022, August. High spectral resolution airborne microwave sounder (HiSRAMS). In 2022 47th international conference on infrared, millimeter and terahertz waves (IRMMW-THZ) (pp. 1-2). IEEE.
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Liu, L., Bliankinshtein, N., Huang, Y., Gyakum, J.R., Gabriel, P.M., Xu, S. and Wolde, M., 2025. Comparative experimental validation of microwave hyperspectral atmospheric soundings in clear-sky conditions. Atmospheric Measurement Techniques, 18(2), pp.471-485.
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Liu, L., Bliankinshtein, N., Huang, Y., Gyakum, J.R., Gabriel, P.M., Nguyen, C., Ranjbar, K., Bala, K., Qu, Z., Borque, P., Wolde, M., and Schuettemeyer, D. “An airborne all-sky radiative closure test of microwave radiometers,” in preparation, 2025.
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Bliankinshtein, N., Nguyen, C., Ranjbar, K., Borque, P., Nichman, L., Bala, K., Huang, Y., Liu, L., Riot-Bretecher, B., Bigras, E., Brindley, H., Murray, J., Mariani, Z., Blanchet, J.-P., Blanchard, Y., Loftus, A., Barucci, M, Belotti, C., Bianchini, G., Palchetti, L., Viciani, S., Warwick, L., Oetjen, H., Schuettemeyer, D., 2025. W-band, HiSRAMS, AERI, FIRR-2, FINESSE and FIRMOS Experiment on Remote Sensing (WHAFFFERS): multi-frequency, multi-platform campaign overview. In 2025 ESA Living Planet Symposium, Vienna, Austria.
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Xu, S., Bliankinshtein, N., Gabriel, P., Liu, L., Wolde, M., Huang, Y., Auriacombe, O., Krus, M. and Angevain, J.C., 2023, July. Low-level processing of passive hyperspectral microwave measurements from HiSRAMS. In IGARSS 2023-2023 IEEE International Geoscience and Remote Sensing Symposium (pp. 1096-1099). IEEE.
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Bliankinshtein, N., Gabriel, P., Auriacombe, O., Huang, Y., Wolde, M., Xu, S., Liu, L. and Angevain, J.C., 2023, September. Radiometric calibration of a hyperspectral microwave sounder. In 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) (pp. 1-2). IEEE.
