Range-Doppler mapping of space-based targets using the JRO 50 MHz radar

• Autores: Kesaraju, S., Mathews, J. D., Milla, Marco, Vierinen, J.
• Formato: artículo
• Fecha de Publicación: 2017
• Institución: Instituto Geofísico del Perú
• Repositorio: IGP-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.igp.gob.pe:20.500.12816/2302
• Enlace del recurso: http://hdl.handle.net/20.500.12816/2302; https://doi.org/10.1007/s11038-017-9510-0
• Nivel de acceso: acceso abierto
• Materia: Jicamarca; Range-Doppler; Motion compensation; Moon; http://purl.org/pe-repo/ocde/ford#1.05.01

The Jicamarca Radio Observatory (JRO) two-dimensional square array radar system operating at ~ 6-m wavelength was used to study the Moon and low Earth orbit satellites using the Range-Doppler inverse synthetic aperture radar technique also known as Delay-Doppler imaging. The radar data was collected on Oct 21, 2015. A circularly polarized coded pulse was transmitted from a quarter-array antenna segment during lunar transit over JRO. Dual-linear polarization receive systems were employed on two quarter-array segments and on two 1/64th array modules giving the longest possible baselines across the transit path. A Range-Doppler mapping technique that uses the rotational motion of the targets and an autofocusing motion and ionospheric delay compensation technique has been implemented to generate the two-dimensional maps of the point-target (Satellite) and range-spread target (Moon). A review of our technique and the maps obtained from these observations is presented herein. Range-Doppler maps of the Moon and satellites are instructive with regards to possible further improvement of the technique, especially regarding ionospheric compensation.