The Utah Geospatial Resource Center (UGRC), along with the Utah Statewide Information and Analysis Center (SIAC), has been made aware of planned GPS testing that will lead to intermittent GPS disruptions throughout large portions of Utah, Idaho, and a small portion of Wyoming between September 13th - 29th, 2023. The testing will be centered at both Dugway Proving Grounds, Utah and near Mountain Home, Idaho.
This interference may impact users that are reliant on the GPS network to operate survey equipment. The testing schedule is as follows:
Dugway Proving Grounds, Utah (199.1 Mile Radius): September 13th - 23rd, 2023
Testing will be centered on the Dugway Proving Grounds with a 199.1 mile radius and will take place daily between 0000 MDT - 0600 MDT.
Mountain Home, Idaho (211.7 Mile Radius): September 13th - 29th, 2023
Testing will occur near Mountain Home, ID with a 211.7 mile radius taking place between 1400-1700 hours and 1900-2300 hours on varying dates, as listed below:
| Date | Time |
|---|---|
| 13 SEP 23 | 1400 MDT – 1700 MDT |
| 14 SEP 23 | 1900 MDT - 2300 MDT |
| 15 SEP 23 | 1400 MDT - 1700 MDT |
| 15 SEP 23 | 1900 MDT - 2300 MDT |
| 16 SEP 23 | 1900 MDT - 2300 MDT |
| 18 SEP 23 | 1400 MDT - 1700 MDT |
| 18 SEP 23 | 1900 MDT - 2300 MDT |
| 19 SEP 23 | 1400 MDT - 1700 MDT |
| 19 SEP 23 | 1900 MDT - 2300 MDT |
| 20 SEP 23 | 1400 MDT - 1700 MDT |
| 20 SEP 23 | 1900 MDT - 2300 MDT |
| 21 SEP 23 | 1400 MDT - 1700 MDT |
| 21 SEP 23 | 1900 MDT - 2300 MDT |
| 22 SEP 23 | 1400 MDT - 1700 MDT |
| 22 SEP 23 | 1900 MDT - 2300 MDT |
| 25 SEP 23 | 1400 MDT - 1700 MDT |
| 25 SEP 23 | 1900 MDT - 2300 MDT |
| 26 SEP 23 | 1400 MDT - 1700 MDT |
| 26 SEP 23 | 1900 MDT - 2300 MDT |
| 27 SEP 23 | 1400 MDT - 1700 MDT |
| 27 SEP 23 | 1900 MDT - 2300 MDT |
| 28 SEP 23 | 1400 MDT - 1700 MDT |
| 28 SEP 23 | 1900 MDT - 2300 MDT |
| 29 SEP 23 | 1400 MDT - 1700 MDT |
| 29 SEP 23 | 1900 MDT - 2300 MDT |
If you experience GPS disruptions during this time, contact the staff from UGRC at ugrc@utah.gov | 801-538-3665.