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Repeat microgravity data from Santa Cruz River, Tucson, Arizona, 2019-2021

December 15, 2021

Relative-gravity surveys were carried out using a ZLS Burris relative-gravity meter. The effect of solid Earth tides and ocean loading were removed from the data. Instrument drift was removed by evaluating gravity change during repeated measurements at one or more base stations. Absolute-gravity surveys were carried out using a Micro-g LaCoste, Inc. A-10 absolute-gravity meter. Vertical gradients between the different measuring heights of the absolute- and relative-gravity meters were measured using a relative-gravity meter and fully-adjustable tripod, and used to correlate the measurements between the two instruments. Relative-gravity differences and absolute-gravity data were combined using a least-squares network adjustment, as implemented in the software GSadjust (https://doi.org/10.5066/P9YEIOU8). Information about the network adjustment is provided under Data Quality in the metadata.

Publication Year 2021
Title Repeat microgravity data from Santa Cruz River, Tucson, Arizona, 2019-2021
DOI 10.5066/P9K11FAZ
Authors Libby M. Wildermuth
Product Type Data Release
Record Source USGS Asset Identifier Service (AIS)
USGS Organization Arizona Water Science Center, Tucson Office
Rights This work is marked with CC0 1.0 Universal
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