DOI: 10.5061/dryad.w9ghx3g24
title: The infrared instrument for sea surface temperature (iriss): An innovative and simplified design for measuring ocean surface skin temperature

description: The InfraRed Instrument for Sea Surface temperature (IRISS) is a
 simplified design that uses a one-point in situ calibration and separate
 sensors to measure the sea and sky radiance. The standard wavelength band
 (9.6-11.5 microns) and a so-called optimal band (7.5-7.85 microns) were
 evaluated by comparison to the Remote Ocean Surface Radiometer (ROSR)
 during an extensive field deployment. The dataset structure is CSV files
 containing time series with variable names at the beginning of the file.
 Potential reuse includes verifying the performance.  There are no
 legal or ethical considerations.
description: # The infrared instrument for sea surface temperature (iriss): An
 innovative and simplified design for measuring ocean surface skin
 temperature Dataset DOI:
 [10.5061/dryad.w9ghx3g24](10.5061/dryad.w9ghx3g24) ## Description of the
 data and file structure The importance of accurate measurements of ocean
 skin temperature, *T~skin~*, is increasingly recognized for a wide range
 of air-sea interaction research. However, *T~skin~* measurements currently
 are made using complex infrared radiometer systems that have been limited
 to ship deployments. Major measurement challenges are *in situ*
 calibration, a separate sky measurement to correct for reflected
 downwelling radiance, and emissivity uncertainty. The InfraRed Instrument
 for Sea Surface temperature (IRISS) is a simplified design that uses a
 one-point *in situ* calibration and separate sensors to measure the sea
 and sky radiance. The standard wavelength band (9.6-11.5 mm) and a
 so-called optimal band (7.5-7.85 mm) were evaluated by comparison to the
 Remote Ocean Surface Radiometer (ROSR) during an extensive field
 deployment. Both versions were found to have accuracy comparable to ROSR
 and thus meet the design goal of ±0.10 °C. The dataset structure is CSV
 files containing time series with variable names at the beginning of the
 file. Potential reuse includes verifying the performance. There are no
 legal or ethical considerations.  ### Files and variables #### NSF OCE
 Award 2241269 and Jessup et al [2025, in review] All times are UTC All
 temperature are Centigrade 
 
 Filenames        IRISS_Tout_C45_v3.csv       IRISS data optimal band
 IRISS_Tout_C85_v3.csv       IRISS data standard band Data column names    
 T_skin Skin Temperature (uncalibrated) T_brt   Brightness Temperature
 (uncalibrated) T_sky  Sky Temperature T_shutter         Shutter
 Temperature T_offset          Offset Temperature dT_amb_skin  Temperture
 difference between sensor and skin T_corr_amb     Temperature correction
 for self-emission T_skin_cal       Skin Temperature (calibrated)
 T_brt_cal         Brightness Temperature (calibrated) 
 
 Filename iriss_time_avg.csv       time in number of seconds since
 1/1/1904 
 
 Filenames rosr9_data.csv rosr3_data.csv Data column names yyyy    year
 mo       month dd        day hh        hour mn       minute ss        
 second Ts        skin temperature Tsu      skin temperature (uncorrected)
 T1        blackbody 1 temperature T2        blackbody 2 temperature
 k1        blackbody 1 counts k2        blackbody 2 counts ksea     sea
 counts ksky     sky counts dsea     unknown pitch    pitch roll       roll
 esea     emissivity lat        latitude lon       longitude sog      
 speed over ground (m/s) cog      course over ground (degrees True) tktcase
 case temperature             ## Code/software Not Applicable ## Access
 information Other publicly accessible locations of the data: * None Data
 was derived from the following sources: * Author