PVC/MET/M1 - Tower lowered

Met tower was lowered during this time. Data may be inaccurate.

• wind_dir_sd
• wind_spd_arith_max
• wind_spd_arith_min
• Barometric Pressure(atmos_pressure)
• relh_sd
• Vapor pressure mean(vappress_mean)
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• wind_spd_arith_sd
• Mean Air Temperature or Hardware Error(temp_mean)
• temp_sd
• Relative humidity mean(relh_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• vappress_sd

PVC/SKYRAD/M1 - Intake Fan Failure

PSP (down_short_hemisp) ventilator fan failed from start of PVC deployment.  Site ops 
repaired/replaced on 8/28. Instrument data are not recoverable.

The down_short_hemisp data are not recoverable but can be re-constructed using the 
short_direct_normal and down_short_diffuse_hemispheric measurements and the following formula: 

Global = Direct * cos(zenith angle) + Diffuse

• inst_global

• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

PVC/GNDRAD/M1 - Reprocessed: Incorrect calibration

Incorrect program used in Gndrad since PVC deployment period began.  The Gndrad program 
was corrected 10/04/2012 approx 20:17GMT.  Reprocessing will be required of the upwelling 
PSP (up_short_hemsip). This will require applying the following corrections for the time 
range specified.
Serial number:
serial number(original) = 30938
serial number(corrected) = 37297

Data:
up_short_hemip(corrected) = up_short_hemisp(original)*(113.25(new cal)/129.42(old cal))

Reprocessing completed 20121119.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• up_short_hemisp_std

• inst_up_short_hemisp

PVC/SKYRAD/M1 - Reprocessed: Incorrect calibration coefficients

Incorrect programs were used in Skyrad since PVC deployment period began.  The Skyrad 
program was corrected 09/05/2012 approx 20:00GMT. Reprocessing will be required of all 
instruments at this station except the IRT. This will require applying the following 
corrections for the time range specified. 
Serial numbers(incorrectly applied): 
PIR1-DIR: 34306
PIR2-DIR: 34303
Diffuse PSP: 34284
NIP: 34097
PSP-DS: 34293

Serial numbers(correct): 
PIR1-DIR: 34303
PIR2-DIR: 34306
Diffuse PSP: 35751
NIP: 37285
PSP-DS: 37302
    
Data: 
Longwave requires reprocessing using the 20second datastream and applying the following k1 
coefficients (note: the longwave instruments were swapped according to datalogger).
down_long_hemisp1 (old cal) = 0.23041
down_long_hemisp1 (corr cal) = 0.24750
down_long_hemisp2 (old cal) = 0.24750
down_long_hemisp2 (corr cal) = 0.23041

Shortwave only requires application of the following corrections to 1min and 20 second 
data.
down_short_diffuse_hemisp(corr) = down_short_diffuse_hemisp(old value)*(104.45(corr 
cal)/120.91(incorr cal))
short_direct_normal(corr) = short_direct_normal(old value)*(117.25(new cal)/124.97(incorr 
cal))
up_short_hemip(corr) = up_short_hemip(old value)*(119.21(new cal)/108.48(incorr cal))

Contact radiometer mentor with any comments/questions

Reprocessing completed 20121217

• inst_down_long_hemisp1_case_resist
• inst_global
• inst_diffuse
• inst_direct_normal
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp2_dome_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp2_tp

• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_long_hemisp2_std
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• inst_down_long_hemisp2_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• inst_down_long_hemisp2_tp
• down_long_hemisp1_max
• down_long_hemisp2_min
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_long_hemisp1_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• down_long_hemisp2_max
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• down_short_hemisp_std
• inst_down_long_hemisp2_dome_temp
• inst_down_long_hemisp1_case_temp
• inst_down_long_hemisp1_dome_temp
• down_long_hemisp1_min
• inst_down_long_hemisp1_tp

PVC/SKYRAD/M1 - Reprocess: Incorrect IRT Configuration

The SKYRAD IRT was installed temporarily (waiting for the new enclosure) in
a vertical orientation, without the use of the gold mirror. When irt_comm
was started, the emissivity parameter in the startup file was not changed to 1.000 
compensate for the absence of the mirror, resulting in a positive bias of about 5 K.

These data may be corrected by adjusting the radiance values for the difference in 
emmissivity.

• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_max

PVC/SKYRAD/M1 - IRT failure

The IRT failed because of water intrusion.

• inst_sky_ir_signal

• sky_ir_temp_std
• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_max

PVC/SKYRAD/M1 - IRT scale factor

The IRT was replaced with a unit with the wrong analog output configuration, such that the 
sky temperature was below the measurable range, resulting in a constant output of 0 
volts or 173.2 K.

• inst_sky_ir_signal

• sky_ir_temp_std
• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_max

PVC/MET/M1 - False positive precipitation

Optical rain gauge recorded significantly more precipitation than expected. Instrument was 
removed/replaced and sent for recalibration.

• org_carrier_mean
• Rain, surface, 1-min avg(precip_rate_mean)
• precip_rate_min
• precip_rate_sd
• precip_rate_max

PVC/SKYRAD/M1 - Instrument noise

All instruments on Skyrad exhibit intermittant erratic behavior from 10/05 through 10/23. 
Appears to have been an grounding issue with the IRT installed on Skyrad and replaced 
10/17. After the last problem period on 10/23 the problem resolved itself without operator 
involvement.

All data on Skyrad during these erratic behaviour periods are not recoverable. Bad data 
can generally be identified by screening vBatt for values outside normal operation range of 
13.3-13.6V.

• inst_down_long_hemisp1_case_resist
• inst_global
• inst_diffuse
• inst_sky_ir_signal
• inst_direct_normal
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp2_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp2_tp

• sky_ir_temp_std
• sky_ir_temp_min
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_long_hemisp2_std
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• inst_down_long_hemisp2_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• inst_down_long_hemisp2_tp
• down_long_hemisp1_max
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_long_hemisp2_min
• down_long_hemisp1_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• down_long_hemisp2_max
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• down_short_hemisp_std
• inst_down_long_hemisp2_dome_temp
• inst_down_long_hemisp1_case_temp
• inst_down_long_hemisp1_dome_temp
• IR Brightness Temperature(sky_ir_temp)
• down_long_hemisp1_min
• sky_ir_temp_max
• inst_down_long_hemisp1_tp

PVC/SKYRAD/M1 - IRT disconnected

The IRT was disconnected to diagnose PIR signal noise.

• sky_ir_temp_std
• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_max

PVC/MET/M1 - Tower lowered

The tower containing the wind sensor was not at full-height of 10 meters following 
Hurricane Sandy.

• wind_spd_arith_max
• wind_dir_sd
• wind_spd_arith_min
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• wind_spd_arith_sd
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)

PVC/GNDRAD/M1 - IRT failure

The IRT failed but continued producing a misleading analog signal. The ground surface 
temperature measurements were unrepresentative of the actual temperature.

• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• sfc_ir_temp_std
• Effective Surface (Skin) Temperature(sfc_ir_temp)

• inst_sfc_ir_signal

PVC/MET/M1 - PWD data intermittently missing

Present weather detector was occasionally reporting a hardware problem during this time. 
The reported error did not affect visibility readings, but caused all other data to report 
as missing. Error resolved its self with no indication of the problem cause.

• pwd_cumul_snow
• pwd_pw_code_1_hr
• pwd_avg_H2O_int_1_min
• pwd_pw_code_inst
• pwd_pw_code_15_min
• pwd_cumul_water

PVC/SKYRAD/M1 - Pending Storm

Site prepartation for pending storm in Cape Cod Area included stowing the tracker for the 
affected period.  During this time the only Skyrad instruments that will read accurately 
will be down_short_hemisp (global horizontal shortwave pyranometer instrument), 
down_long_hemisp1 and 2 (pyrgeometer instrument) will read correct values.
Additionally, there may have been undocumented periods of missing data during this time.

• inst_diffuse
• inst_direct_normal

• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)