TWP/SKYRAD/C2 - Reprocess: PIR identified as unshaded is really shaded

On 17Sep01 the Global PIR was moved from the unshaded position on the Skyrad stand to the 
new 'shaded' spot on the new K&Z tracker. It is still using the same Logger channel as it 
did as an unshaded PIR even though it is now shaded.

• Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_case_temp)
• Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std)
• Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_dome_temp)
• Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max)
• Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min)

TWP/GNDRAD/C2 - IRT problem

The GNDRAD IRT exhibited a positive bias compared to the PIR from 2100 to 0700 UTC each 
day. The problem was corrected by removing the signal cable, cleaning the contacts, and 
reconnecting the cable.

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

TWP/SKYRAD/C2  - IRT incorrect min/delta values

For field sky_ir_temp, the value of valid_min was incorrectly assigned to -49.7 C and no 
value of valid_delta was assigned. The actual values should be -60 and 50 C, respectively.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Sky Infra-Red Temperature(sky_ir_temp)

TWP/GNDRAD/C2 - incorrect IRT calibration

When the GNDRAD data logger was upgraded, the calibration offset for the IRT was initially 
incorrect.

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

TWP/SKYRAD/C2 - IRT bias

The IRT appears to be measuring higher sky temperatures than the AERI. There is no 
indication as to its cause or whether the IRT or the AERI is at fault.

PRB note: because the AERI is calibrated between each sample, the AERI
data has a high degree of confidence and the bias is likely on the part
of the IRT.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Sky Infra-Red Temperature(sky_ir_temp)

TWP/SKYRAD/C2 - IRT bias

The IRT was measuring higher sky temperatures than AERI. The problem was corrected by 
changing the mirror.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Sky Infra-Red Temperature(sky_ir_temp)
• Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)

TWP/GNDRAD/C2 - IRT connector

The IRT had a problem with the connector of either the signal or power cable which 
produced an output of 0 volts equivalent to a measurement of 223K. The problem was corrected 
when the connectors were cleaned and tightened.

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

TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.

• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)

TWP/SKYRAD/C2 - IRT signal loss

There was a significant drop in logger voltage that corresponds with a loss of the IR 
temperature. This was possibly due to a loose connection.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Sky Infra-Red Temperature(sky_ir_temp)
• Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)

TWP/SKYRAD/C2 - IRT signal

The IRT exhibited a bias of the analog voltage output that caused problems with the 
signals from the other SKYRAD radiometers. The bias was due to corrosion between the power and 
signal connections in the IRT cable. The IRT was disconnected on 10/18/2006 at 01:20 and 
replaced on 11/6/2006 at 23:00 but it too appeared to have grounding problems due to 
internal corrosion and was disconnected on 11/11/2006 at 11:42 and then intermittently 
reconnected for testing. A second spare was installed on 12/4/2006 which did not cause problems 
with the signals from the other instruments.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Sky Infra-Red Temperature(sky_ir_temp)
• Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)

TWP/GNDRAD/C2 - IRT signal

When the other GNDRAD radiometers were replaced on 12/3/2006, the quality of the IRT 
signal began to degrade until 12/26 when it became unusable. The instrument was replaced on 
2/4/2007.

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

TWP/SKYRAD/C2 - Short direct normal

The short_direct_normal (NIP) data are missing or incorrect due to instrument cable 
failure.  The cable was replaced.

The short_direct_normal can be calculated using the following relationship for shortwave 
radiometers:
global hemispheric = diffuse hemispheric + direct normal *cos (zenith angle)

• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)

• Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
  Voltage(inst_direct_normal)

TWP/SKYRAD/C2 - IRT measurement error

The IRT was not properly calibrated and was not able to measure sky temperatures below 
273.2 K. (This instrument was the same one damaged by lightning in November 2005 in Darwin. 
It was returned for repair and received a new lens but was calibrated only down to 0 deg 
C, so the problem was neither detected nor repaired.) The IRT was replaced on 2/22/2007.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Sky Infra-Red Temperature(sky_ir_temp)
• Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)

TWP/GNDRAD/C2 - Reprocess: IRT calibration

The configuration of the IRT was set to that used at TWP/C3. This caused the calibration 
of the data to be wrong. It was corrected by reconfiguring the IRT to match the datalogger 
program.
   
These data can be reprocessed and corrected by adding 10K, i.e. sfc_ir_temp(new) = 
sfc_ir_temp(old) + 10K.

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

TWP/GNDRAD/C2 - Reprocessed: Incorrect calibration

The Gndrad PSP was changed out 11/25 but the datalogger program was not updated until 
11/30.

PSP #31293 installed 20071125.2202.  Correct calibration coefficient = 123.46.

Reprocessed to correct upwelling shortwave hemispheric irradiance (US) by:
US(new) = (US(old) / 123.56 ) * 123.46

Reprocessing completed March 2008.

• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Standard
  Deviation(up_short_hemisp_std)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Minima(up_short_hemisp_min)

• Instantaneous Upwelling Shortwave Hemispheric Irradiance, Pyranometer(inst_up_short_hemisp)

TWP/SKYRAD/C2 - Reprocessed: Incorrect calibrations

The SKYRAD PSPs were changed out 11/25 but the datalogger program was not updated until 
11/30.

Reprocessed to correct calibration per:
  down_short_diffuse(corrected) = down_short_diffuse(orig) * (118.18/112.42)
  short_direct_normal(corrected)= short_direct_normal(orig) * (122.20/118.11)
  down_short_hemips(corrected) = down_short_hemisp(orig) * (133.16/137.57)

Reprocessing completed March 2008.

• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
  Deviation(down_short_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)

• Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
  Thermopile Voltage(inst_diffuse)
• Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
  Voltage(inst_global)
• Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
  Voltage(inst_direct_normal)

TWP/SKYRAD/C2 - Direct Normal reading too low

The NIP (direct_normal shortwave irradiance) measurement was reading too low during this 
time period.  No TWP Ops documentation could be found to determine the cause but data 
review indicate that the NIP appeared to be reading low by about 25W/m2 during this period.  
The NIP data had well defined steps in irradiance when compared to three component checks 
indicating the problem period.

• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)

• Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
  Voltage(inst_direct_normal)

• null(Raw data stream - documentation not supported)

TWP/SKYRAD/C2 - Tracker failure

Tracker failed to wake up on 12/17.  Ops reset tracker on 12/21.  

The affected instruments are the 8-48 (down_short_diffuse) and NIP (direct_normal) 
shortwave instruments.

• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)

• Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
  Voltage(inst_direct_normal)
• Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
  Thermopile Voltage(inst_diffuse)

TWP/GNDRAD/C1 - Incorrect dome calibration factor

The Manus GNDRAD PIR had an incorrect dome factor since installation.  The following is an 
estimate by Chris Cornwall of the magnitude of the effect of this calibration error. The 
magnitude of this error is smaller than the calibration accuracy.

"Processed the instantaneous data from ARCS2 (10, 30 and 50 seconds after the minute) 
using 4.32 as the dome factor, and also using 4.00 as the dome factor, as it should have 
been. The difference between the calculated irradiance results was negligible, as was 
expected with an instrument operating in the downward-facing direction.

Over the three days from 11/06/98 to 11/08/98, the error between the two signals averaged 
0.09%.  Overnight values were much lower than this, daytime values peaked at 0.42%. The 
statistics for these error signals were as follows:
  average error 0.000895
  standard dev  0.001119
  max error     0.004242
  min error    -0.00064

We should change ARCS1 so it is using the correct value for the groundrad pir dome 
coefficient (4.0 instead of 4.32), and we may want to include a DQR stating these findings, 
although they are much smaller than the overall uncertainty of the PIR itself."

• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• Instantaneous PIR1 uncorrected irradiance(pir1_voltage)
• Instantaneous PIR1 case thermistor(pir1_case_therm)

• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Standard
  Deviation(up_long_hemisp_std)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)

• PIR1 unshaded mean(pir1_mean)
• PIR1 unshaded minimum(pir1_min)
• PIR1 unshaded standard deviation(pir1_sd)
• PIR1 unshaded maximum(pir1_max)

TWP/GNDRAD/C2 - Instrument inverted for Calibration

The GNDRAD was inverted to look at the sky for comparison
with other radiometers.

• Dummy altitude for Zeb(alt)
• Instantaneous PIR1 case thermistor(pir1_case_therm)
• lat(lat)
• Instantaneous PIR1 uncorrected irradiance(pir1_voltage)
• base time(base_time)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• lon(lon)
• GPS raw data filename(filename)
• Time offset of tweaks from base_time(time_offset)

• null(Raw data stream - documentation not supported)

• base time(base_time)
• Net Radiation, Minima(net_min)
• Battery Voltage(internal_voltage)
• PIR1 unshaded maximum(pir1_max)
• PSP1 unshaded minimum(psp1_min)
• PIR1 unshaded standard deviation(pir1_sd)
• Dummy altitude for Zeb(alt)
• Logger panel temperature(logger_temp)
• PSP1 unshaded standard deviation(psp1_sd)
• GPS raw data filename(filename)
• PSP1 unshaded maximum(psp1_max)
• Net Radiation, Maxima(net_max)
• IRT1 mean(irt1_mean)
• PIR1 unshaded minimum(pir1_min)
• Time offset of tweaks from base_time(time_offset)
• PIR1 unshaded mean(pir1_mean)
• Bit data. See details.(bit_data)
• NET mean(net_mean)
• IRT1 standard deviation(irt1_sd)
• lon(lon)
• IRT1 maximum(irt1_max)
• NET standard deviation(net_sd)
• PSP1 unshaded mean(psp1_mean)
• IRT1 minimum(irt1_min)
• lat(lat)
• External voltage(external_voltage)

Calibration data interruption at TWP Nauru

Data interrupted to perform electronic calibration of data logger

• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Instantaneous PIR2 case thermistor(pir2_case_therm)
• Instantaneous PIR1 uncorrected irradiance(pir1_uncorr_irradiance)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• Instantaneous PIR1 case thermistor(pir1_case_therm)
• Dummy altitude for Zeb(alt)
• Instantaneous PIR2 uncorrected irradiance(pir2_uncorr_irradiance)
• Instantaneous UVB temperature(uvb_temp)
• Instantaneous PIR2 dome thermistor(pir2_dome_therm)
• Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
• base time(base_time)
• GPS raw data filename(filename)
• lon(lon)

• lon(lon)
• IRT1 maximum(irt1_max)
• PSP shaded mean(psps_mean)
• PSP shaded standard deviation(psps_sd)
• NIP standard deviation(nip_sd)
• NIP minimum(nip_min)
• lat(lat)
• PIR1 unshaded minimum(pir1_min)
• GPS raw data filename(filename)
• PIR shaded standard deviation(pirs_sd)
• PIR1 unshaded standard deviation(pir1_sd)
• PSP shaded maximum(psps_max)
• PSP shaded minimum(psps_min)
• UVB standard deviation(uvb_sd)
• UVB maximum(uvb_max)
• PIR shaded maximum(pirs_max)
• PIR shaded minimum(pirs_min)
• IRT1 minimum(irt1_min)
• PSP1 unshaded minimum(psp1_min)
• PSP1 unshaded standard deviation(psp1_sd)
• PIR shaded mean(pirs_mean)
• Battery Voltage(internal_voltage)
• base time(base_time)
• Dummy altitude for Zeb(alt)
• NIP mean(nip_mean)
• PSP1 unshaded maximum(psp1_max)
• External voltage(external_voltage)
• Logger panel temperature(logger_temp)
• IRT1 mean(irt1_mean)
• PSP1 unshaded mean(psp1_mean)
• Time offset of tweaks from base_time(time_offset)
• NIP maximum(nip_max)
• PIR1 unshaded mean(pir1_mean)
• UVB minimum(uvb_min)
• UVB mean(uvb_mean)
• IRT1 standard deviation(irt1_sd)
• PIR1 unshaded maximum(pir1_max)
• Bit data. See details.(bit_data)

• null(Raw data stream - documentation not supported)

• PSP shaded mean(psps_mean)
• IRT1 standard deviation(irt1_sd)
• lat(lat)
• lon(lon)
• IRT1 mean(irt1_mean)
• NIP mean(nip_mean)
• Battery Voltage(internal_voltage)
• UVB maximum(uvb_max)
• base time(base_time)
• PIR shaded minimum(pirs_min)
• Dummy altitude for Zeb(alt)
• PIR1 unshaded maximum(pir1_max)
• Time offset of tweaks from base_time(time_offset)
• PSP1 unshaded maximum(psp1_max)
• Logger panel temperature(logger_temp)
• IRT1 minimum(irt1_min)
• PSP shaded standard deviation(psps_sd)
• IRT1 maximum(irt1_max)
• NIP maximum(nip_max)
• PIR1 unshaded standard deviation(pir1_sd)
• PSP1 unshaded standard deviation(psp1_sd)
• GPS raw data filename(filename)
• NIP standard deviation(nip_sd)
• PIR shaded mean(pirs_mean)
• PIR1 unshaded minimum(pir1_min)
• PSP shaded minimum(psps_min)
• NIP minimum(nip_min)
• PSP1 unshaded mean(psp1_mean)
• External voltage(external_voltage)
• UVB minimum(uvb_min)
• PIR1 unshaded mean(pir1_mean)
• UVB standard deviation(uvb_sd)
• PIR shaded maximum(pirs_max)
• PIR shaded standard deviation(pirs_sd)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded maximum(psps_max)
• UVB mean(uvb_mean)
• Bit data. See details.(bit_data)

Cailbration interruption of data at TWP Nauru

Data interrupted to perform electronic calibration of data logger

• Dummy altitude for Zeb(alt)
• lat(lat)
• base time(base_time)
• GPS raw data filename(filename)
• Time offset of tweaks from base_time(time_offset)
• Instantaneous PIR1 case thermistor(pir1_case_therm)
• Instantaneous PIR1 uncorrected irradiance(pir1_voltage)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• lon(lon)

• null(Raw data stream - documentation not supported)

• Logger panel temperature(logger_temp)
• PIR1 unshaded mean(pir1_mean)
• Net Radiation, Maxima(net_max)
• lon(lon)
• PIR1 unshaded standard deviation(pir1_sd)
• Dummy altitude for Zeb(alt)
• Battery Voltage(internal_voltage)
• IRT1 mean(irt1_mean)
• External voltage(external_voltage)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• GPS raw data filename(filename)
• PIR1 unshaded minimum(pir1_min)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded minimum(psp1_min)
• IRT1 standard deviation(irt1_sd)
• NET mean(net_mean)
• IRT1 maximum(irt1_max)
• PSP1 unshaded maximum(psp1_max)
• Net Radiation, Minima(net_min)
• NET standard deviation(net_sd)
• Bit data. See details.(bit_data)
• base time(base_time)
• IRT1 minimum(irt1_min)
• PIR1 unshaded maximum(pir1_max)
• PSP1 unshaded mean(psp1_mean)

• Net Radiation, Minima(net_min)
• Battery Voltage(internal_voltage)
• PSP1 unshaded minimum(psp1_min)
• Dummy altitude for Zeb(alt)
• Net Radiation, Maxima(net_max)
• Time offset of tweaks from base_time(time_offset)
• Bit data. See details.(bit_data)
• IRT1 maximum(irt1_max)
• lat(lat)
• base time(base_time)
• PIR1 unshaded maximum(pir1_max)
• PIR1 unshaded standard deviation(pir1_sd)
• Logger panel temperature(logger_temp)
• GPS raw data filename(filename)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded maximum(psp1_max)
• IRT1 mean(irt1_mean)
• PIR1 unshaded minimum(pir1_min)
• PIR1 unshaded mean(pir1_mean)
• NET mean(net_mean)
• IRT1 standard deviation(irt1_sd)
• lon(lon)
• NET standard deviation(net_sd)
• PSP1 unshaded mean(psp1_mean)
• IRT1 minimum(irt1_min)
• External voltage(external_voltage)

TWP/SKYRAD/C2 - Calibration data interruption Nauru

IRT covered with Black-Body for calibration check

• IRT1 maximum(irt1_max)
• IRT1 minimum(irt1_min)
• IRT1 standard deviation(irt1_sd)
• IRT1 mean(irt1_mean)

• null(Raw data stream - documentation not supported)

• IRT1 mean(irt1_mean)
• IRT1 standard deviation(irt1_sd)
• IRT1 minimum(irt1_min)
• IRT1 maximum(irt1_max)