New station added to data stream

The maximum number of stations changed from 14 to 15 on 10/1/97. The new 
station is Winnfield, AR (31.90, 92.78). The ingest was changed to
accommodate the extra station.

• north beam elevation angle(ebeam_el_stn)
• site number(site_num_stn)
• vertical beam elevation angle(vbeam_el_stn)
• Wind Speed(wspd)
• Relative Humidity (hybrid-b grid)(rh)
• north beam azimuth angle(nbeam_az_stn)
• Environmental Temperature (hybrid-b grid)(temp)
• Pressure reduced to mean sea level(press)
• Station altitude(alt_stn)
• Anemometer indicator(anem_ind)
• -180.0 - +180.0(alt)
• Time offset from base_time(time_offset)
• orientation from true N(orient_n_stn)
• surface rainfall count(rain)
• Profiler in checkout mode(checkout_mode)
• north beam elevation angle(nbeam_el_stn)
• east beam azimuth angle(ebeam_az_stn)
• lon(lon)
• Dewpoint Temperature(dp)
• vertical beam azimuth angle(vbeam_az_stn)
• Wind Direction(wdir)
• Count of 6-minute periods to compute average(avg_count)
• North Latitude(lat)
• Station longitude(lon_stn)
• base time in epoch(base_time)
• Station Latitude(lat_stn)
• magnetic declination(magnetic_dcn_stn)