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INGV GPS Loss of Lock (LoL) events global maps from ESA Swarm satellites
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.. contents:: The tiny table of contents

Global maps of GPS LoL (Loss of Lock) events, as derived by total electron content observations from the Swarm satellites (A, B, and C) at 1Hz rate, from 1 January 2014 to 31 December 2020.

Swarm is an ESA constellation constituted by three low-Earth-orbit satellites launched at the end of 2013, and still operating, in a circular near-polar orbit. Two of them (Swarm A and C) have the same orbit configuration: an inclination of 87.35°, an initial altitude of about 460 km, and an initial east–west separation of about 1°–1.5° in longitude. The third (Swarm B) has a different orbital configuration: an inclination of 87.75° and an initial altitude of about 520 km. Precise Orbit Determination (POD) antennas are GPS
receivers through which TEC values are estimated. Level 2 (L2) TEC data contain time series of vertical and slant (both absolute and relative) TEC for each GPS satellite in view (at most eight due to the instrumentation design). Swarm’s data are freely downloadable at ftp://swarm-diss.eo.esa.int.

**References:**

* `De Michelis et al. (2022), Space Weather, 20, e2022SW003129. <https://doi.org/10.1029/2022SW003129>`_

* `Lovati et al. (2023a), Scientific Reports, 9287. <https://doi.org/10.1038/s41598-023-34727-2>`_

* `Lovati et al. (2023b), Journal of Geophysical Research: Space Physics, 128, e2023JA031411. <https://doi.org/10.1029/2023JA031411>`_

* `Pezzopane et al. (2021), Remote Sensing, 13, 2209. <https://doi.org/10.3390/rs13112209>`_

**Providers**:

- **Swarm A satellite** - source:

  - ESA Swarm A Precise Orbit Determination (POD) antenna, https://swarm-diss.eo.esa.int/
- **Swarm B satellite** - source:

  - ESA Swarm B Precise Orbit Determination (POD) antenna, https://swarm-diss.eo.esa.int/
- **Swarm C satellite** - source:

  - ESA Swarm C Precise Orbit Determination (POD) antenna, https://swarm-diss.eo.esa.int/


| **Product Type**: data

| **Status**: Active

| **Creation date**: 2022-04-26T16:16:20+02:00

| **Last Update**: 2023-10-01T12:00:00+02:00

Data Description
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| **Data type**: image

| **Data formats**: - text files


| **Sample**: https://drive.google.com/file/d/11vcJiTgmVprf6R0vGb33RVg2WAv_l4OS/view?usp=sharing

Capabilities
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- ext2220.3: Download: Web GUI
- ext2230.3: Download: ASPIS.py

