Details
| Original language | English |
|---|---|
| Title of host publication | Geodesy for Planet Earth - Proceedings of the 2009 IAG Symposium |
| Pages | 373-379 |
| Number of pages | 7 |
| Publication status | Published - 2012 |
| Event | IAG Symposium on Geodesy for Planet Earth, IAG 2009 - Chania, Crete, Argentina Duration: 31 Aug 2009 → 4 Sept 2009 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 136 |
| ISSN (Print) | 0939-9585 |
Abstract
The so-called Colombo-Nyquist (Colombo, The global mapping of gravity with two satellites, 1984) rule in satellite geodesy has been revisited. This rule predicts that for a gravimetric satellite flying in a (near-)polar circular repeat orbit, the maximum resolvable geopotential spherical harmonic degree (lmax) is equal to half the number of orbital revolutions (nr) the satellite completes in one repeat period. This rule has been tested for different observation types, including geoid values at sea level along the satellite ground track, orbit perturbations (radial, along-track, cross-track), low-low satellite-to-satellite tracking, and satellite gravity gradiometry observations (all three diagonal components). Results show that the Colombo-Nyquist must be reformulated. Simulations indicate that the maximum resolvable degree is in fact equal to knr + 1, where k can be equal to 1, 2, or even 3 depending on the combination of observation types. However, the original rule is correct to some extent, considering that the quality of recovered gravity field models is homogeneous as a function of geographical longitude as long as lmax < nr/2.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
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Geodesy for Planet Earth - Proceedings of the 2009 IAG Symposium. 2012. p. 373-379 (International Association of Geodesy Symposia; Vol. 136).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Dependency of resolvable gravitational spatial resolution on space-borne observation techniques
AU - Visser, P. N.A.M.
AU - Schrama, E. J.O.
AU - Sneeuw, N.
AU - Weigelt, M.
PY - 2012
Y1 - 2012
N2 - The so-called Colombo-Nyquist (Colombo, The global mapping of gravity with two satellites, 1984) rule in satellite geodesy has been revisited. This rule predicts that for a gravimetric satellite flying in a (near-)polar circular repeat orbit, the maximum resolvable geopotential spherical harmonic degree (lmax) is equal to half the number of orbital revolutions (nr) the satellite completes in one repeat period. This rule has been tested for different observation types, including geoid values at sea level along the satellite ground track, orbit perturbations (radial, along-track, cross-track), low-low satellite-to-satellite tracking, and satellite gravity gradiometry observations (all three diagonal components). Results show that the Colombo-Nyquist must be reformulated. Simulations indicate that the maximum resolvable degree is in fact equal to knr + 1, where k can be equal to 1, 2, or even 3 depending on the combination of observation types. However, the original rule is correct to some extent, considering that the quality of recovered gravity field models is homogeneous as a function of geographical longitude as long as lmax < nr/2.
AB - The so-called Colombo-Nyquist (Colombo, The global mapping of gravity with two satellites, 1984) rule in satellite geodesy has been revisited. This rule predicts that for a gravimetric satellite flying in a (near-)polar circular repeat orbit, the maximum resolvable geopotential spherical harmonic degree (lmax) is equal to half the number of orbital revolutions (nr) the satellite completes in one repeat period. This rule has been tested for different observation types, including geoid values at sea level along the satellite ground track, orbit perturbations (radial, along-track, cross-track), low-low satellite-to-satellite tracking, and satellite gravity gradiometry observations (all three diagonal components). Results show that the Colombo-Nyquist must be reformulated. Simulations indicate that the maximum resolvable degree is in fact equal to knr + 1, where k can be equal to 1, 2, or even 3 depending on the combination of observation types. However, the original rule is correct to some extent, considering that the quality of recovered gravity field models is homogeneous as a function of geographical longitude as long as lmax < nr/2.
UR - http://www.scopus.com/inward/record.url?scp=84881220939&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-20338-1_45
DO - 10.1007/978-3-642-20338-1_45
M3 - Conference contribution
AN - SCOPUS:84881220939
SN - 9783642203374
T3 - International Association of Geodesy Symposia
SP - 373
EP - 379
BT - Geodesy for Planet Earth - Proceedings of the 2009 IAG Symposium
T2 - IAG Symposium on Geodesy for Planet Earth, IAG 2009
Y2 - 31 August 2009 through 4 September 2009
ER -