Repeat microgravity data from Santa Cruz River, Tucson, Arizona, 2020-2021

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.

Data and Resources

Field Value
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identifier USGS:608867b5d34e5611588f95e5
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modified 20210721
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publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
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Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • arizona
  • arizona-water-science-center
  • artificial-recharge
  • ckan
  • geo
  • geophysics
  • geoscientificinformation
  • geoss
  • gravimeter-measurement
  • gravitational-field-earth
  • groundwater
  • heritage
  • national
  • north-america
  • southwest-gravity-program
  • time-series-datasets
  • tucson
  • united-states
  • usgs-608867b5d34e5611588f95e5
isopen False
license_id notspecified
license_title License not specified
maintainer Libby M. Wildermuth
maintainer_email lwildermuth@usgs.gov
metadata_created 2025-11-21T00:32:38.840978
metadata_modified 2025-11-21T00:32:38.840982
notes 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.
num_resources 2
num_tags 21
title Repeat microgravity data from Santa Cruz River, Tucson, Arizona, 2020-2021