=========================================================================
INGV ROTEI ionospheric index time series at 1Hz from ESA Swarm satellites
=========================================================================

.. contents:: The tiny table of contents

Time series of ROTEI (Rate Of change of electron TEmperature Index) ionospheric index, as derived by in-situ electron temperature observations from the ESA Swarm satellites (A, B, and C) at 1Hz rate, from 1 January 2014 to 31 December 2020. Along with ROTEI values, time and position of the satellite, flags, and some quantities related to ROTEI calculation are also provided.

Data for ionospheric indices calculation are collected by the ESA Swarm satellites mission. Swarm is a 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 (inclination of 87.4°, initial altitude of about 460 km, east-west separation of about 1°–1.5° in longitude). The third (Swarm B) has a different orbital configuration (inclination of 88°, initial altitude of about 520 km) compared to the couple Swarm A and C. In-situ electron density (Ne) and electron temperature (Te) observations are collected by Langmuir Probes (LP). Precise Orbit Determination (POD) antennas are GPS receivers from which the TEC is determined, both vertical and slant, for each GPS satellite in view. Swarm’s data are freely downloadable at ftp://swarm-diss.eo.esa.int.

**References:**

De Michelis et al. (2020), Journal of Geophysical Research: Space Physics, 125, e2020JA027934. https://doi.org/10.1029/2020JA027934

De Michelis, et al. (2021a), Remote Sensing, 13, 759. https://doi.org/10.3390/rs13040759

De Michelis, et al. (2021b), Scientific Reports, 11, 6183, https://doi.org/10.1038/s41598-021-84985-1

De Michelis et al. (2022), Remote Sensing, 14, 918. https://doi.org/10.3390/rs14040918

Pignalberi (2021), Computers and Geosciences, 48, 104675, https://doi.org/10.1016/j.cageo.2020.104675

Pignalberi et al. (2021), Universe, 7, 290. https://doi.org/10.3390/universe7080290


**Providers**:

- **Swarm A satellite** - source:

  - ESA Swarm A Electric Field Instrument - Langmuir Probe, https://swarm-diss.eo.esa.int/
- **Swarm B satellite** - source:

  - ESA Swarm B Electric Field Instrument - Langmuir Probe, https://swarm-diss.eo.esa.int/
- **Swarm C satellite** - source:

  - ESA Swarm C Electric Field Instrument - Langmuir Probe, 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
~~~~~~~~~~~~~~~~

| **Data type**: tableset

| **Data formats**: - text files


| **Sample**: https://drive.google.com/file/d/1R6ssT78KgLLBwxsEMGRWqNcLdGlLF3aY/view?usp=sharing

Capabilities
~~~~~~~~~~~~

- ext2220.3: Download: Web GUI
- ext2220.2: Standard Query: Web GUI
- ext2230.2: Advanced Query: ASPIS.py
- ext2230.3: Download: ASPIS.py

