GDP-32
II
INSTRUCTION MANUAL
May 2002 Section 9, Page 2
9.1 INTRODUCTION
PROGRAM DESCRIPTION
The Time Domain Induced Polarization (TDIP) program uses cross-correlation methods to lock
on to the transmitted signal when operating in the asynchronous mode, and standard phase-lock
stacking and averaging for the synchronous mode.
Refer to Section 6 – Receiver Setup for information concerning calibration, synchronization and
generic screens and field parameters of all Survey Programs. Refer to the end of this section for
suggestions for field measurement receiver connections.
FREQUENCY RANGE
The standard frequency ranges from 0.015625 (1/64 Hz) to 32 Hz.
FILTER
The TDIP Survey Program has a digital telluric filter, also referred to as a Moving Average
(MAV) filter, for rejection of low frequency tellurics.
CALIBRATION CACHE
Calibration data for the TDIP Survey Program are stored in the Time Domain Calibration Cache.
NOTE: The TEM and NanoTEM Survey Programs also use the Time Domain Calibration Cache.
Overwriting calibration data in this cache causes all Time Domain calibration data to be lost.
However, the Time Domain IP and TEM calibration data should be identical.
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