Download Ahmad Khan Kharal: A Punjabi Hero of 1857 by Saeed Bhutta PDF

By Saeed Bhutta

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For non-tidal 36 Jürgen Neumeyer et al. Fig. 3. Gravity variations for Metsahovi station including Earth tidal STA, SSA and SA. forces induced elastic deformation the load Love numbers must be applied. Figure 3 shows an example of Metsahovi station. For this purpose the SG data have been processed according to the above processing procedure but without reduction of the long-periodic tidal waves STA, SSA and SA (GrV_LP). From this data set monthly averages (mGrV_LP) are calculated. For comparing with CHAMP the mass and deformation potential terms must be considered.

1999]. After these gravity reductions we got the SG gravity variations. For comparing with CHAMP, monthly means of the gravity variations were calculated. - 4 Comparison results The present SG network comprises 20 stations in operation. 207 deg, h=406 m). For the time period from Dec. 2001 to Dec. 2002 the gravity data of these sites were processed according to the above processing procedure. For comparison monthly averages of the gravity variations are used. The assigned CHAMP values are taken from the monthly global gravity field solutions for the coordinates of the selected SG sites.

Amazon area). Key words: gravity field, CHAMP, Superconducting Gravimeter, gravity variation 1 Introduction One objective of the new-generation satellite gravity missions CHAMP and GRACE is the recovery of temporal Earth gravity field variations. For the CHAMP mission the gravity resolution is about 1 µgal at a half wavelength spatial resolution of λ/2 = 5000 km with a temporal resolution of 1 month. For the GRACE mission a largely increased resolution is expected. Of fundamental interest is the combination of satellite-based and surface gravity measurements.

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