LOCAL GRAVITY FIELD MODELING AT THE SEA AREA VIA SATELLITE ALTIMETRY OBSERVATIONS CASE STUDY: LOCAL GRAVITY FIELD OF GESHM ISLAND

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ARDALAN A.A.; ARAB SAHEBI R.

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Journal: Year:2006 | Volume:39 | Issue:5 (93) Page(s): 633-644

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Title

LOCAL GRAVITY FIELD MODELING AT THE SEA AREA VIA SATELLITE ALTIMETRY OBSERVATIONS CASE STUDY: LOCAL GRAVITY FIELD OF GESHM ISLAND

Author(s)

ARDALAN A.A. | ARAB SAHEBI R. | Issue Writer Certificate

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Abstract

Detailed gravity field modeling requires ground, sea, airborne and satellite gravity observations. Sea gravity observations have been always suffering from the low accuracy and noises. On the other hand satellite altimetry provides accurately sea level variations. In this paper possibility of gravity field modeling at sea areas, especially at islands, using satellite altimetry is studied. A method for this purpose is devised which algorithmically can be explained as follows: (1) Obtain Mean Sea Level (MSL) from satellite altimetry. (2) Obtain Sea Surface Topography (SST) from oceanographic sea current and studies. (3) Compute the geoid by removing SST from MSL. (4) Apply inverse ellipsoidal Bruns formula and compute the gravity potential at the reference ellipsoid. (5) Remove gravitational effect of ellipsoidal harmonic expansion to degree and order 360 and the centrifugal acceleration. (6) Remove terrain effect using Newton integral over the terrain masses at the radius of 55 km around the computational points. (7) Upward continue the harmonic gravitational potential derived in step 6 using ellipsoidal Abel-Poisson integral. (8) Restore the effects removed in steps 5 - 6 at the computational point. This procedure is applied for gravity field modeling at Geshm Island and its surrounding area. The details of the method and results of the case study are presented in this paper.

Cites

تعیین ژئوئید در جزایر با استفاده از حل مساله مقدار مرزی گرانی سنجی - ارتفاع سنجی ماهواره ای با مرزهای ثابت بررسی خاص: تعیین ژئوئید در جزیره قشم

References

A NEW GLOBAL OCEAN TIDE ANALYSIS AND COMPUTATION OF MEAN SEA LEVEL MODEL BASED ON ORTHONORMAL BASE FUNCTIONS USING 11 YEARS OF TOPEX/POSEIDON SATELLITE ALTIMETRY OBSERVATIONS

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APA: Copy

ARDALAN, A.A., & ARAB SAHEBI, R.. (2006). LOCAL GRAVITY FIELD MODELING AT THE SEA AREA VIA SATELLITE ALTIMETRY OBSERVATIONS CASE STUDY: LOCAL GRAVITY FIELD OF GESHM ISLAND. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 39(5 (93)), 633-644. SID. https://sid.ir/paper/14441/en

Vancouver: Copy

ARDALAN A.A., ARAB SAHEBI R.. LOCAL GRAVITY FIELD MODELING AT THE SEA AREA VIA SATELLITE ALTIMETRY OBSERVATIONS CASE STUDY: LOCAL GRAVITY FIELD OF GESHM ISLAND. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2006;39(5 (93)):633-644. Available from: https://sid.ir/paper/14441/en

IEEE: Copy

A.A. ARDALAN, and R. ARAB SAHEBI, “LOCAL GRAVITY FIELD MODELING AT THE SEA AREA VIA SATELLITE ALTIMETRY OBSERVATIONS CASE STUDY: LOCAL GRAVITY FIELD OF GESHM ISLAND,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 39, no. 5 (93), pp. 633–644, 2006, [Online]. Available: https://sid.ir/paper/14441/en

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