Accession Number : AD0707072

Title :   SIMULATED OCEAN RADAR IMPULSE RESPONSES FROM LUNAR RADAR MEASUREMENTS,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Shapiro,A. ; Yaplee,B. S. ; Uliana,E. A.

Report Date : 07 MAY 1970

Pagination or Media Count : 22

Abstract : Measurements of the radar impulse response from rough surfaces should provide criteria for relating the radar return with the vertical structure of these surfaces. Such information is needed to use more efficiently ocean satellite radar observations for describing sea surface structure. While no direct measurements of the radar impulse response are available from a fluid surface, the NRL lunar high-range-resolution radar observations can provide equivalent radar impulse response measurements from a solid rough surface. The lunar radar measurements were used to simulate the ocean impulse response, and thus provide some insight into the effect of different surface roughnesses on the radar return. The radar returns from five lunar areas of different surface roughness were analyzed and the impulse response derived. The results indicate that the size of the vertical structure correlates with the width of the impulse response, and that quantitative information concerning the parameters of mean height and surface roughness can be obtained by computing the power centroid and standard deviation of the impulse response. However, due to the nonuniform distribution of the lunar surface features, the two parameters will depend on the particular location of the surface features and the scanning speed of the radar observations. (Author)

Descriptors :   (*MOON, *RADAR CROSS SECTIONS), (*EXTRATERRESTRIAL TOPOGRAPHY, SURFACE ROUGHNESS), (*OCEANS, SURFACE PROPERTIES), CORRELATION TECHNIQUES, RECONNAISSANCE SATELLITES, RADAR PULSES, SIMULATION

Subject Categories : Astrophysics
      Physical and Dynamic Oceanography
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE