Repeat microgravity data from Phoenix, Arizona, 2020-2023
Description
This dataset represents the network-adjusted results of relative- and absolute-gravity surveys performed from 2020 to 2023 in and near the city of Phoenix, Arizona. Relative surveys were done using a Zero Length Spring, Inc. Burris relative-gravity meter. Absolute-gravity surveys were done using a Micro-g LaCoste, Inc. A-10 absolute-gravity meter. The effect of solid Earth tides and ocean loading were removed from the data prior to network adjustment. Non-linear instrument drift was removed by evaluating gravity change during repeated measurements at one or more base stations. Vertical gradients between the relative- and absolute-gravity meters were measured at each station where both types of measurement were collected to correlate the measurements of the two instruments. Vertical gradients were measured using a relative-gravity meter and tripod set to the height of the absolute-gravity meter. Relative-gravity differences and absolute-gravity data were combined using least-squares network adjustment, as implemented in the software GSadjust (https://code.usgs.gov/sgp/gsadjust). Data are provided for 105 stations collected over 4 discrete, annual surveys.
Resources
| Name |
Format |
Description |
Link |
|
55 |
The metadata original format |
https://data.usgs.gov/datacatalog/metadata/USGS.6579c898d34e952b2274a634.xml |
|
55 |
Landing page for access to the data |
https://doi.org/10.5066/P96Q1OZG |
Tags
- southwest-gravity-program
- gravimeter-measurement
- geophysics
- phoenix
- arizona-water-science-center
- geoscientificinformation
- usgs-6579c898d34e952b2274a634
- maricopa-county
- arizona
- hydrogeology
- gravitational-field-earth