Data File Description for "HIWIND Observation of Summer Season Polar Cap Thermospheric Winds" Dataset
Digital Object Identifier (DOI) for the Dataset: https://doi.org/10.5065/ad71-8827
Created: 2019-04-09

1.       2018180hiwind.dat.txt
HIWIND observation data file. The ASCII data file contains, latitude (deg), longitude (deg) , UT (hr), meridional wind (m/s), meridional wind error (m/s), UT (hr), zonal wind (m/s), zonal wind error (m/s) on day 2018180.
 
2.      hiwindtiegcm1.252018180.sav 
TIEGCM simulation (normal soft electron precipitation) of thermospheric winds at HIWIND location and time (to use the data, enter IDL, type restore, ‘ file name’, the variables will be available to you to use) on day 2018180.  
 
BLAT, balloon latitude (deg)
BLON, balloon longitude (deg)
BUTIME, balloon sample time (UT, hr)
TMIOND, meridional ion drift at 250 km (m/s)
TMWIND, meridional neutral wind at 250 km (m/s)
TZIOND, zonal ion drift at 250 km (m/s)
TZWIND, zonal neutral wind at 250 km (m/s)
 
3.      hiwindtiegcm1.25highpreci2018180.sav 
Same as hiwindtiegcm1.252018180.sav but for TIEGCM simulation with more soft electron precipitation.
 
4.     hiwindtiegcm125wm2018180.sav
TIEGCM simulation (normal soft electron precipitation)of  the thermospheric meridional (VN) and zonal (UN) winds, meridional (VI) and zonal (UI) ion drift, and electron density (STNE) at Resolute (RES, 74N, 95W), Boulder (BLD, 40N, 105W), Eureka (EUR, 80N, 86W), Jang Bogo (JBS, 75S, 164E), Kiruna (KRN, 68N, 20E), Millstone Hill (MSH, 43N, 72W), Poker Flat (PKF, 65N, 147W) on day 2018180.   The wind and ion drift data are at 250 km from UT 0 to 23 hr m/s.  Electron densities are in electrons per cubic meter.  Data points are in 10 minute interval. 
Altrange, altitude values for the electron density profiles (96.47 to 497.6 km), e.g., STNEWMBLD and  STVIWMBLD are electron density and meridional ion drift at Boulder. Letters WM stands for Weimer ion convection model used in the simulation.
 
5.     hiwindtiegcm125wmhighpreci2018180.sav
Same as hiwindtiegcm125wm2018180.sav, but for TIEGCM simulation with more soft electron precipitation.

6.	1min_vvels.txt
RISR-C Ion drift data at 250 km.  The RISR-C ion drift file contain all the best possible ion drift data for this event from RISR-C (day 180 June 30, 2018). This data is centered at a CGM magnetic latitude of 81.175 N and magnetic longitude of 33.81 W (Geographic 74.73N, 94.91W). Note that the text files include error bars.  The ion drift data was derived using the algorithm outlined in [Heinselman and Nicolls 2008] with non-overlapping 0.25 degree latitude bins. This data was then post-processed using a median filter in latitude to produce a single ion drift time series.  Heinselman, C. J., and Nicolls, M. J. ( 2008), A Bayesian approach to electric field and E‐region neutral wind estimation with the Poker Flat Advanced Modular Incoherent Scatter Radar, Radio Sci., 43, RS5013, doi:10.1029/2007RS003805