PYE/NFOV/M1 - Intermittent missing data

During the Pt Reyes deployment of the NFOV, the instrument experienced intermittent data 
gaps due to communications problems.  Data gaps occurred for the following date ranges:
20050718-20050723
20050727-20050730
20050803-20050804
20050813-20050816
20050820-20050822
20050826-20050827
20050830-20050902
20050908-20050910

• null(Raw data stream - documentation not supported)

• Calibrated Zenith Radiance, 870 nm(radiance_870nm)
• Tube Temperature(tube_temp)
• Raw counts from instrument before calibration, 673 nm(raw_counts_673nm)
• time(time)
• Cosine of Solar Zenith Angle(cosine_solar_zenith_angle)
• Raw counts from instrument before calibration, 870 nm(raw_counts_870nm)
• base time(base_time)
• Calibrated Zenith Radiance, 673 nm(radiance_673nm)
• Detector Temperature(head_temp)
• Time offset of tweaks from base_time(time_offset)

PYE/NFOV/M1 - Intermittent data gaps

Intermittent data collection of the NFOV.  Data collection not successful regularly during 
day light hours but generally caught up during the nighttime hours.  Occasionally the 
system stopped collecting altogether and a reboot of the network components was required to 
restart collection. Data gaps are largest 18 through 23 of July and 27 through 30 July.

• null(Raw data stream - documentation not supported)

• Tube Temperature(tube_temp)
• Calibrated Zenith Radiance, 870 nm(radiance_870nm)
• Dummy altitude for Zeb(alt)
• lat(lat)
• Cosine of Solar Zenith Angle(cosine_solar_zenith_angle)
• base time(base_time)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Raw counts from instrument before calibration, 673 nm(raw_counts_673nm)
• time(time)
• Raw counts from instrument before calibration, 870 nm(raw_counts_870nm)
• Calibrated Zenith Radiance, 673 nm(radiance_673nm)
• Detector Temperature(head_temp)

PYE/SONDE/M1 - Broken RH sensor

One of the RH sensors on this radiosonde was bad.  The RH oscillates rapidly between near 
0 and ambient up to approximately 11 km.  The near-zero values are incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

PYE/SONDE/M1 - Bad temperature and RH

The temperature appears to be approximately 10 degC too high during the entire sounding.  
This also causes the RH to be too low.  Most likely the problem was a bad temperature 
sensor.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)
• Dry bulb temperature(tdry)

PYE/SONDE/M1 - Bad RH sensor

The RH sensor heating circuit failed on this sounding.  RH values during the first part of 
the sounding oscillate between a reasonable value and a very low value.  It appears that 
(a) the heating was out of phase, and (b) incorrect values were being reported during 
the first 10 minutes or so of flight.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

PYE/SONDE/M1 - Bad RH sensor

Two problems here - failure of the RH sensor heating circuit and a bad RH sensor.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)