R/V Kilo Moana
This documents the installation of the Infrared Sea surface temperature autonomous radiometer (ISAR) on the R/V Kilo Moana for the KM11-30 cruise from Apia Samoa to Honolulu from 6-16 Dec 2011.

The expedition was organized and led by Andy Jessup, Applied Physics Laboratory of the University of Washington. The purpose of the cruise was to field test and compare a variety of ocean temperature devices.

It was decided that this was an excellent opportunity to evaluate the ISAR and its new data collection package, DAQ3. The DAQ system is designed to provide real time calibrated SST_skin measurements and transmit these through the iridium SBD satellite telemetry system.

  • The R/V Kilo Moano is a SWATH mall water area twin hull) vessel. LOA 56.7 m, Beam 26.8 m, Draft 7-7.6 m.
  • The ISAR and MAERI mount on the forward bridge deck rail staring forward between the hulls.
  • This aerial photo shows minimal wake effects.
  • Bridge Roof Forward. The view here is a 45 degree view to clear water.
  • Maeri Mk2 & Isar01 on the bow rail facing forward.
  • Isar frame is made of non-corrosive fiberglas structure with 316 SS hardware.
  • The APL group deployed a catamaran package with SST measurements on board. This instrument provided the T_5cm time series.
  • The KM track line during the measurement period.
  • Isar SST during the trackline.
  • SST during standard time series. COMMON TIME BASE Number points = 1472 From 2011-12-06 (340) 10:50:00 to 2011-12-16 (350) 16:00:00 Time step = 10 minutes centered on the time stamp.
  • APL calibration but the bath computer was not working. We took points by hand and computed the calibration. The three calibrations (cal1,cal2,cal3) are compared. The data was reprocessed for the three different calibration coefs. The means over the entire cruise were cal1-cal2=0.025+/-.03 and cal3-cal2=0.009+/-.04. Cal2 was used for the real time data. Uncertainty from calibrations is about 0.02 with excursions to 0.15.v
  • Air temperature fromvv three sources.
  • Three different sea temperature measurements. The ISAR agrees well with the APL Seabird probe at 5 cm. The skin (ISAR) is slightly cooler than the temperature just below the surface which is expected. The ship intake temperature, taken about 2 m below the surface is considerably warmer than the others.