The Incoherent Scatter Radar (ISR) at the European Incoherent SCATter 
(EISCAT) has been in operation since 1981.  The transmitter and one receiver
is at Tromso, Norway (69.58N, 19.23E) at the approximate apex magentic 
latitude of 66.4 magN, and so is often in the auroral zone.  At 300 km the
IGRF B magnitude is 0.4687 gauss, with inclination angle of 77.997 deg and
declination angle of 4.538.  There are two other receivers for bistatic 
operation at Kiruna, sweden (67.87N, 20.43E) and in Sodankyla, Finland 
(67.37N, 26.63W).  These are all UHF receivers, where a separate VHF 
receiver and transmitter is located at Tromso.
  The EISCAT Svalbard Radar (ESR) on Svalbard Island, Norway has been in 
operation since 1996 at (75.15N, 16.05E) at the approximate apex magentic 
latitude of 75.0 magN, and so is often in the polar cap.  At 300 km the
IGRF B magnitude is 0.4822 gauss, with inclination angle of 82.236 deg and
declination angle of 2.5870.  
  Plots and data for both ISRs are available at http://www.eiscat.se/madrigal 
in the EISCAT node of the Madrigal Database.  The contact person is Esa Turunen
(esa.turunen@eiscat.se).  Another possible EISCAT contact who is in
charge of World-Day scheduling is Ingemar Haggstrom  (ingemar@eiscat.se,
46-(980)-79155, Fax 46-(980)-79159, EISCAT Scientific Association, Box 812, 
SE-98128 Kiruna, Sweden).  Please contact them early to confirm correct 
use of the ISR data and to offer co-authorship for any publications.
  ACKNOWLEDGMENTS:  We are indebted to the Director and staff of EISCAT 
for operating the facility and supplying the data.  EISCAT is an international 
association supported by Finland (SA, Suomen Akatemia), France (CNRS, Centre
National de la Recherche Scientifique), Germany (MPG, Max-Planck-Gesellschaft), 
Japan (NIPR, National Institute for Polar Research), Norway (NFR, Norges
forskningsrad), Sweden (NFR, Naturvetensckapliga forskningsradet), and the
United Kingdom (PPARC, Particle Physics and Astronomy Research Council).
  These data for the joint GEM-CEDAR Challenge of 2011 were taken from
kindat=6800, which used 3 separate positions as tau1 (20 deg elevation
at the Tromso UHF site), tau2 (77.5 deg elevation at the Tromso UHF site,
where the other 2 UHF sites were used to get electric field vectors), and 
tau8 (30 deg elevation at the Tromso VHF site).  The tau2 77.5 deg elevation
data had 42 altitudes from 76-674 km.  Only 32 altitudes from 106-674 km were 
retained.  At Svalbard, the 42m data were labelled tau0 at 81.6 deg elevation 
for 53 altitudes between 78-1253 km.  Only 31 altitudes from 102-613 km were
retained.  Both ISR data sets were around 1 minute with a fine height resolution 
power profile (for uncorrected Ne with kindat 6801) at the same time.  
  We used the tau2 Tromso data and tau0 Svalbard data with corrected Ne
(in m-3), Te (as Te/Ti), Ti (in K), and line-of-sight (LOS) ion velocity, which
is similar to Wi for elev 77 and 82.  The Ne data were retained if the Ne error 
bar was less than the Ne value.  The Ti, Te, and LOS drift data were retained 
if the temperature error bars were <200 K, if Te/Ti were between 0.2 and 5.0, 
and if Ti>500K for ht>300km.  The LOS drift data with error bars >200 m/s were
also deleted.  The GEM-CEDAR Challenge included the values of LOS Vi (~Wi), Ne, 
Te, and Ti near 250 km (at 246+/-~20km) from kindat 6800 in files labelled
eis(or esr)_...20m_profiles.  
  Approximately 20 EISCAT and 10 Svalbard 1-min profiles were averaged every 20 min 
to improve the data quality, where the error bars were the standard deviations.  If 
only 1 value was in the average at a particular height, the error bar was the original
error bar.  The maximum Ne value (Nmax in m-3) was found in each averaged profile 
between 100-600 km at height hmax (km).  If a polynomial fit could be made, Nmax and 
hmax were refined.  The total electron content (TEC in m-2) was found between 100-600 km.
Nmax and Nmax were not always in the F-region, and TEC will be added later, so none of 
the variables in the eis(or esr)_..._20m_nmax files were used in the GEM-CEDAR Challenge.  
  The analyst for making these 20-min data was Barbara Emery of HAO/NCAR.