Accession Number : AD0463078


Title :   Anomaly Selection for Deflection Interpolation Part 2. Practical Application


Descriptive Note : Final rept.


Corporate Author : HAWAII UNIV HONOLULU INST OF GEOPHYSICS


Personal Author(s) : Strange, W E ; Woollard, G P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/463078.pdf


Report Date : Jul 1964


Pagination or Media Count : 74


Abstract : The Test Phase utilized three astro-geodetic deflection stations in the Rocky Mountain area of the western United States. These were deflection stations 102, 105, and 116 from USC+GS Special Publication No. 229. Using the adopted procedure, the Xi deflection component was interpolated between stations 105 and 116 to obtain an interpolated Xi value at station 102. A comparison of this interpolated Xi value with the astro-geodetic Xi value showed that the two differed by only .22 in. Since the accuracy of the astrogeodetic values probably do not exceed =.2 in., the results were considered highly satisfactory. The Application Phase pursued deflection interpolation in an area in the Alps chosen by ACIC. In this case three deflection stations were chosen from a deflection of the vertical map provided by ACIC. These were designated stations 1, 2, and 3 for convenience. Using the adopted procedure, the eta deflection component was interpolated between stations 1 and 3 to obtain a value at station 2. As there were no individual deflection values given, the astro-geodetic deflections were estimated from a eta deflection component contour map with a 2.50 in. contour interval. Because of the manner of obtaining the astro-geodetic deflections, they are considered to have an accuracy of the order of =.5 in.


Descriptors :   *GEODESICS , ANOMALIES , CORRECTIONS , DEFLECTION , ERRORS , EXPERIMENTAL DATA , GEOPHYSICS , GRAVITY , ISOSTATIC CHANGE , MAPS , MOUNTAINS , NUMERICAL METHODS AND PROCEDURES , SELECTION , TABLES(DATA) , TERRAIN


Subject Categories : Geodesy


Distribution Statement : APPROVED FOR PUBLIC RELEASE