CHAMP and Swarm solar activity- and height-scaled polar cap plasma density measurements

Solar activity- and height-adjusted plasma density measurements in the polar cap (i.e., above 80° latitude in Modified Apex₁₁₀ coordinates) from the Swarm and CHAMP satellites. covering the entire CHAMP mission period (2002–2009) and the Swarm mission period from launch through February 2020. Plasma density measurements are scaled to a nominal solar activity level of &lt;<em>F</em>10.7&gt;₂₇ = 80 sfu, and an altitude of 500 km, as described in Hatch et al. (submitted to JGR: Space Physics; ESSOAr pre-print) This dataset was prepared as a part of the "Swarm+ Coupling High-Low Atmosphere Interactions: Ion Outflow" project (project website) (ESA website), and is funded by European Space Agency Contract #4000126731. Data are stored in HDF5 format as a Python Pandas dataframe. They can be loaded into Python via the following. <pre><code class="language-python">import pandas as pd df = pd.read_hdf('CHAMP_Swarm_polarcap_adjDensity.hdf',key='df')</code></pre> The data columns are 'NeAdj' : Solar activity- and height-adjusted plasma density (cm^-3) 'a110lat' : Modified Apex₁₁₀ latitude (deg) 'a110lon' : Modified Apex₁₁₀ longitude (deg) 'mlt' : Modified Apex₁₁₀ magnetic local time 'h_km' : satellite altitude (km) 'gclat' : geocentric latitude (deg) 'gclon' : geocentric longitude (deg) 'sat' : satellite identifier (string, one of 'A', 'B',' 'C', or 'CHAMP')