UPDATING ATMOSPHERIC DELAY MODELS WITHIN A GEOGRAPHIC REGION
A central location system provides an end-to-end high-accuracy positioning solution that provides navigation, geo-tagging, and general positioning data to receivers. The central location system does this by providing a cloud correction service and a robust positioning engine. For example, the central location system may provide single-frequency receivers with corrections for atmospheric delays and multipath throughout different geographic regions. The central location system computes corrections by leveraging location data from dual-frequency receivers. The central location system may also increase ionospheric delay coverage of portions of a geographic region. With increased ionospheric delay coverage, receivers can compute better location estimates. The central location system may also compute refined location estimates of single-frequency receivers and/or dual-frequency receivers for receivers with limited access to signals transmitted from satellites. The central location system may do this by estimating a receiver's location with respect to the location estimates of other receivers.
1 . A method comprising:
accessing, at a central location system, an ionospheric delay model for a geographical region;
determining, by the central location system, a measure of ionospheric delay coverage for one or more portions of the geographic region;
detecting a portion of the geographic region with a measure of ionospheric delay coverage below a threshold level of coverage;
identifying an inactive dual-frequency receiver located within the detected portion of the geographic region; and
activating the identified dual-frequency receiver until the measure of ionospheric delay coverage is greater than the threshold level of coverage.
2 . The method of claim 1 , wherein identifying the inactive dual-frequency receiver comprises identifying a user corresponding to a dual-frequency receiver located outside of the detected portion of the geographic region and incentivizing the user to relocate to the detected portion of the geographic region.
3 . The method of claim 1 , further comprising:
updating the ionospheric delay model in response to detecting a threshold change in atmospheric conditions of the geographical region.
4 . The method of claim 1 , further comprising:
generating, on a user device of a user, a user interface, the user interface including a map of the geographic region and measure of ionospheric delay coverage for the one or more portions of the map; and
identifying, within the map, portions of the geographic region corresponding to a below-threshold level of ionospheric delay coverage.
5 . A method comprising:
accessing, at a central location system, an ionospheric delay model for a geographical region;
accessing, by the central location system, a measure of ionospheric delay coverage for one or more portions of the geographic region;
detecting a portion of the geographic region with a measure of ionospheric delay coverage below a threshold level of coverage;
identifying a dual-frequency receiver located within a threshold distance of the detected portion of the geographic region; and
activating the dual-frequency receiver to relocate to the detected portion of the geographic region.
6 . The method of claim 5 , further comprising:
updating the ionospheric delay model in response to detecting a threshold change in atmospheric conditions of the geographical region.
7 . The method of claim 5 , further comprising:
generating, on a user device of a user, a user interface, the user interface including a map of the geographic region and measure of ionospheric delay coverage for the one or more portions of the map; and
identifying, within the map, portions of the geographic region corresponding to a below-threshold level of ionospheric delay coverage.
8 . A non-transitory computer-readable storage medium containing computer program code that, when executed by a processor, causes the processor to perform steps comprising:
accessing, at a central location system, an ionospheric delay model for a geographical region;
determining, by the central location system, a measure of ionospheric delay coverage for one or more portions of the geographic region;
detecting a portion of the geographic region with a measure of ionospheric delay coverage below a threshold level of coverage;
identifying an inactive dual-frequency receiver located within the detected portion of the geographic region; and
activating the identified dual-frequency receiver until the measure of ionospheric delay coverage is greater than the threshold level of coverage.
9 . The non-transitory computer-readable storage medium of claim 8 , wherein identifying the inactive dual-frequency receiver comprises identifying a user corresponding to a dual-frequency receiver located outside of the detected portion of the geographic region and incentivizing the user to relocate to the detected portion of the geographic region.
10 . The non-transitory computer-readable storage medium of claim 8 , wherein the program code, when executed by the processor, causes the processor to perform further steps comprising:
updating the ionospheric delay model in response to detecting a threshold change in atmospheric conditions of the geographical region.
11 . The non-transitory computer-readable storage medium of claim 8 , wherein the program code, when executed by the processor, causes the processor to perform further steps comprising:
generating, on a user device of a user, a user interface, the user interface including a map of the geographic region and measure of ionospheric delay coverage for the one or more portions of the map; and
identifying, within the map, portions of the geographic region corresponding to a below-threshold level of ionospheric delay coverage.
12 . A system comprising:
a hardware processor; and
a non-transitory computer-readable medium containing instructions that, when executed by the hardware processor, cause the hardware processor to:
access, at a central location system, an ionospheric delay model for a geographical region;
determine, by the central location system, a measure of ionospheric delay coverage for one or more portions of the geographic region;
detect a portion of the geographic region with a measure of ionospheric delay coverage below a threshold level of coverage;
identify an inactive dual-frequency receiver located within the detected portion of the geographic region; and
activate the identified dual-frequency receiver until the measure of ionospheric delay coverage is greater than the threshold level of coverage.
13 . The system of claim 12 , wherein identifying the inactive dual-frequency receiver comprises identifying a user corresponding to a dual-frequency receiver located outside of the detected portion of the geographic region and incentivizing the user to relocate to the detected portion of the geographic region.
14 . The system of claim 12 , further containing instructions that cause the hardware processor to:
update the ionospheric delay model in response to detecting a threshold change in atmospheric conditions of the geographical region.
15 . The system of claim 12 , further containing instructions that cause the hardware processor to:
generate, on a user device of a user, a user interface, the user interface including a map of the geographic region and measure of ionospheric delay coverage for the one or more portions of the map; and
identify, within the map, portions of the geographic region corresponding to a below-threshold level of ionospheric delay coverage.