1. Field Geophysics
Instructors Tom Herring, Brad Hager
Web:
01/20/05
IAP Class 5

2. Activities Today Paper outline with contributions of each student.
Clean up data processing algorithms. Final results will be available after Saturday Jan 22 when the MIT final orbits for the week of Jan 9-15 become available.
Tomorrow we will run gravimeter warm-up test.
01/20/05
IAP Class 5

3. Algorithm clean-up
Main idea: Gravimeter measurements are relative and the instrument drifts with time: Processing need to know the gravity at the base station and each day and offset (and possible drift) are computed between the gravimeter measurements and this base value.
The measurements are effected by earth tides and these need to accounted for. Unix program etgtab will be used. (Earth tide gravity as function of time).
01/20/05
IAP Class 5

4. Aspects of Paper
Each student should select a part of the project that they will present. Suggestions:
Regional gravity context
Analysis of the “density” measurements made (Edge of wash measurements)
Basic calibration of data. Drift corrections, connection to regional gravity measurements.
Interpretation of gravity anomalies
Terrain corrections. Impact on interpretation.
01/20/05
IAP Class 5