The Fabry-Perot Interferometer at Resolute Bay, Canada (74.73N, -94.89E, 87 m ASL) has been operated since 2003 by the High Altitude Observatory of the National Center For Atmospheric Research.  The apex
magnetic coordinates of Resolute Bay at 250 km height in 2004 were (83.1, -39.0) with a magnetic 
declination of -24.4 deg, an inclination of 88.0 deg, and 0 UT at 16.31 MLT.  Thus, the location is 
in the polar cap, usually poleward of the auroral zone.
  The interferometer has an 8-position filter wheel.  The wavelengths used at Resolute Bay are:
1) The red line (630.0 nm, kindat=17011) of atomic oxygen (OI) with a typical emission height peak 
in the range 210 to 300 km. 
2) The green line (557.7 nm, kindat=17012) of atomic oxygen (OI), with a typical emission height 
peak range near 94-98 km.
3) The [OH] line (892.0 nm, kindat=17013) of the nightglow excited hydroxyl [OH*] with an emission 
peak between about 87 and 91 km. 
  These are observations from the red line.  The observing sequence is a zenith observation followed 
by the 4 cardinal directions of W, E S and N at an elevation of 45 degrees above the horizon.  For 
the red line, each direction is integrated for 5 min for a total observing cycle of 25 min.  
  The observations are made during the northern winter season (Sep-Apr). Because of the narrow filters
used, operation of the instrument is not affected by moonlight.  All the observations obtained are 
included since the thermospheric temperature observations are statistically indistinguishable in the
absence or presence of clouds (Smith and Hernandez, Upper thermospheric temperatures at South Pole, 
Adv. Space. Res., 16(5), 31-39, 1995).  This does not apply to the wind and brightness observations, 
which are strongly affected by the presence of clouds, and should not be used if the cloud cover is 
more than 50% (cc>5).  The cloud cover is in tenths of total cloud amount covering the sky, and these
observations are obtained from Environment Canada. The temperatures are not calibrated to absolute 
values and can only be used for relative variations. 
  Doppler shifts (winds) are determined from the displacement of the line profile relative to the 
'zero wind position', which is determined on an hourly basis from the vertical wind in the zenith.
Un is positive eastwards, Vn is positive northwards (or polewards), and Wn is positive upwards.    
  The glat and glon are estimated from the normal 45 degree elevation angle of the observations.  
For an emission height of 250 km, and an elevation angle of 45 degrees, the distance between the 
station and any look direction is 250 km or 2.25 deg in latitude or 8.53 degrees of longitude at
74.73N.  The 5 locations become glat/glon pairs of:
Z  74.73N, 94.89W
W  74.73N, 103.42W
E  74.73N, 86.36W
N  76.98N, 94.89W
S  72.48N, 94.89W
  The 'errors' given in the data are uncertainties of measurement, that is the statistically 
determined effect that noise in the measurement will cause in the final result.  This noise is inherent 
to the signal, since photons obey Bose-Einstein statistics.  These uncertainties are 1 sigma uncertainty 
of the deduced horizontal winds and relative temperatures.