Repeat microgravity data from Santa Cruz River, Tucson, Arizona, 2019-2024 (ver. 2.0, June 2025)

This dataset contains the network-adjusted results of relative- and absolute-gravity surveys performed from 2019 to 2024 in and near the Santa Cruz River channel in the city of Tucson, Arizona. 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. This updated version of data now includes gravity data for 2023 and 2024.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
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catalog_@id https://ddi.doi.gov/usgs-data.json
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catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier http://datainventory.doi.gov/id/dataset/usgs-62a3804bd34ec53d2770bd9b
metadata_type geospatial
modified 2025-06-12T00:00:00Z
old-spatial -110.99760, 32.19820, -110.95500, 32.25560
publisher U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 18bbcc7d4f54811e91509174e0a802dba95ff44e01b4a5f5f7c1f80ac7196db0
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-110.99760, 32.19820], [-110.99760, 32.25560], [ -110.95500, 32.25560], [ -110.95500, 32.19820], [-110.99760, 32.19820]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • arizona
  • arizona-water-science-center
  • artificial-recharge
  • geophysics
  • geoscientificinformation
  • gravimeter-measurement
  • gravitational-field-earth
  • groundwater
  • pima-county
  • santa-cruz-river
  • southwest-gravity-program
  • time-series-datasets
  • tucson
  • usgs-62a3804bd34ec53d2770bd9b
isopen False
license_id notspecified
license_title License not specified
maintainer Jacob L. Conrad
maintainer_email jlconrad@usgs.gov
metadata_created 2025-09-24T05:23:54.881946
metadata_modified 2025-09-24T05:23:54.881959
notes This dataset contains the network-adjusted results of relative- and absolute-gravity surveys performed from 2019 to 2024 in and near the Santa Cruz River channel in the city of Tucson, Arizona. 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. This updated version of data now includes gravity data for 2023 and 2024.
num_resources 1
num_tags 22
title Repeat microgravity data from Santa Cruz River, Tucson, Arizona, 2019-2024 (ver. 2.0, June 2025)