Instruments

 

The M-AERI
Radiosondes
Meteorology and Incident Radiation
All-Sky Camera
Microwave Radiometer
Near Surface Bulk Temperature
Video Camera
Infrared Radiometer
Optical Rain Gauge

 

The M-AERI

Our main piece of equipment is the M-AERI (Marine-Atmosphere Emitted Radiance Interferometer – see Minnett, P. J., R. O. Knuteson, F. A. Best, B. J. Osborne, J. A. Hanafin, and O. B. Brown (2001), The Marine-Atmosphere Emitted Radiance Interferometer (M-AERI), a high-accuracy, sea-going infrared spectroradiometer, Journal of Atmospheric and Oceanic Technology, 18, 994-1013). It is a bulky piece of equipment which sits on a table that mounts on the railing where it can view the surface of the sea ahead of the bow wave, at an angle of about 55 o to the vertical. Typically this is above the flying bridge (see Figures 1a and b), on an elevated foredeck (Figure 1c) or on the foredeck itself (Figure 1d). It also includes an air-conditioned, plastic box containing a computer and electronics that gets strapped to the structure nearby, such as along the back railing of the flying bridge (Figure 2). The preferred configuration, however, is to have the electronics rack in the laboratory. The cable connecting the M-AERIto the electronics box is a thick ‘umbilical’ bundle (about 5 cm diameter) and from the electronics box to the lab we have two cat-5 cables and a power cord. We provide all of the mounting structure for the MAERI, so there are no special requirements from the ship for this, only that the area where we install it be available. In order to get the MAERI components to the appropriate deck we require a crane.In the past, when there has been a crane at the dock working on the ship, we have used it to do our lifts (usually about 15 minutes work). If a ship-based crane is available, so much the better. Otherwise, we have rented a crane to do the lift. Power for the M-AERI is provided via cables to the interior lab. We provide an isolation transformer as well as a UPS unit. Power requirements are maximum ~2 KW.

Figure 1 . M-AERI mounted on port side railing of the Southern Surveyor. The instrument is covered by a tarpaulin, which is the case when there is heavy rain or sea-spray. Measurements are not taken while covered. The nitrogen cylinder is close by in case the interferometer casing develops a leak and moist air enters the instrument; in such cases the instrument is purged by dry nitrogen.
Figure 2. M-AERI Electronics Box, under a tarpaulin – one possible operating configuration.
Figure 3. Equipment in Polar Star Met Lab. In situations where the electronics rack is set up in the lab, it would be positioned, for example, at the end of the table.

For the most part, our equipment is cabled into an interior Dry Lab or Met Lab, (this is often found one deck below the bridge and so is preferable if the M-AERI is mounted above thebridge. Figure 3 shows the interior equipment in the Met Lab on the USCGC Polar Star (keyboard, flat-panel display, laptop computers and video monitors) on the far bench in the lab. The rack between the two benches on the right side of the photo is not a part of our equipment.

 

Last Updated: 14 August, 2006 11:40
Designed by Edward Minnett
© University of Miami 2006