SGP/WPDN - updated station locations for 4 stations

Four stations were updated to more accurate position using GPS system. The updated 
site information for these four stations is as follows:

                       Site    Site    N Lat            Lat     W long         Long     
Elev.    Elev.Decl.   True    E beam  E beam  N beam  N beam  V beam  V beam
#Site Location  ST      #        ID     (degminsec)     (dec.)  (degminsec)     (dec.) 
(ft.)    (m)     (deg)  N       az.     el.     az.     el.     az.     el.
#

Fairbury	NE	 3	FBYN1	40 04 48	40.08	 97 18 36        97.31  
1420    432.8	 6.49	 -10	80.00	73.70	350.00	73.70	350.00	90.00
Haviland	KS	 6	HVLK1	37 39 00	37.65	 99 06 36	 99.11  
2125    647.7	 7.52	 -10	80.00	73.70	350.00	73.70	350.00	90.00
Neodesha	KS	 7	NDSK1	37 18 00	37.30	 95 36 00	 95.60
886.47 232	 5.29	   0	90.00	73.70	  0.00	73.70	  0.00	90.00
Platteville	CO	 1	PLTC2	40 10 48	40.18	104 43 48	104.73  
5000  	1523.9	11.01	   0	90.00	73.70	0.00	73.70	0.00	90.00

always use the updated Lat/Lon positions for the stations even for the time
period before the updates, since they are more accurate.

• Station altitude(alt_stn)
• -180.0 - +180.0(alt)
• Station Latitude(lat_stn)
• North Latitude(lat)
• magnetic declination(magnetic_dcn_stn)
• vertical beam elevation angle(vbeam_el_stn)
• east beam azimuth angle(ebeam_az_stn)
• vertical beam azimuth angle(vbeam_az_stn)
• north beam elevation angle(ebeam_el_stn)
• Station longitude(lon_stn)
• lon(lon)
• north beam elevation angle(nbeam_el_stn)
• north beam azimuth angle(nbeam_az_stn)
• orientation from true N(orient_n_stn)