TY - GEN
T1 - Estimating tropospheric refractivity parameters from radar sea clutter
AU - Tabrikian, Joseph
AU - Krolik, Jeffrey L.
AU - Vasudevan, Sathya
N1 - Publisher Copyright:
© 1999 IEEE.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - The capping inversion of the marine boundary layer is often associated with ducted microwave propagation which can significantly impact shipboard radars. This paper concerns the problem of characterizing ducted propagation by estimating parameters of the index of refraction profile using radar sea clutter returns. Specifically, a maximum a posteriori (MAP) estimate is proposed for determining duct height and its first-order range-dependence under conditions of uncertain slowly range-varying surface backscatter cross-section. In addition, a fast recursively-computed hybrid Cramer-Rao bound on refractivity estimation is developed. Finally, real data refractivity estimation results are presented using radar clutter returns collected off the Virginia coast. Preliminary refractivity estimates compare favorably with measurements made using helicopter-borne instruments out to a range of approximately 50 km.
AB - The capping inversion of the marine boundary layer is often associated with ducted microwave propagation which can significantly impact shipboard radars. This paper concerns the problem of characterizing ducted propagation by estimating parameters of the index of refraction profile using radar sea clutter returns. Specifically, a maximum a posteriori (MAP) estimate is proposed for determining duct height and its first-order range-dependence under conditions of uncertain slowly range-varying surface backscatter cross-section. In addition, a fast recursively-computed hybrid Cramer-Rao bound on refractivity estimation is developed. Finally, real data refractivity estimation results are presented using radar clutter returns collected off the Virginia coast. Preliminary refractivity estimates compare favorably with measurements made using helicopter-borne instruments out to a range of approximately 50 km.
UR - https://www.scopus.com/pages/publications/80052385778
U2 - 10.1109/HOST.1999.778755
DO - 10.1109/HOST.1999.778755
M3 - Conference contribution
AN - SCOPUS:80052385778
T3 - Proceedings of the IEEE Signal Processing Workshop on Higher-Order Statistics, SPW-HOS 1999
SP - 345
EP - 348
BT - Proceedings of the IEEE Signal Processing Workshop on Higher-Order Statistics, SPW-HOS 1999
PB - Institute of Electrical and Electronics Engineers
T2 - 1999 IEEE Signal Processing Workshop on Higher-Order Statistics, SPW-HOS 1999
Y2 - 14 June 1999 through 16 June 1999
ER -