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Designed for extremely fast sampling rate in above-water measurements.

SAS Above Water Optical System

Designed for extremely fast sampling rate in above-water measurements of ocean colour using Satlantic's multispectral or hyperspectral digital optical sensors.

Our Surface Acquisition Systems (SAS) are designed for above-water measurements of ocean colour using Satlantic's multispectral or hyperspectral digital optical sensors. The system consists of two radiance sensors and one irradiance sensor. The main advantage of the MicroSAS system is it's small size and extremely fast sampling rate. Special adapters can also be mounted to the MicroSAS radiometer to narrow the field of view to a half angle of 1.5º to 0.75º. The HyperOCR SAS radiance sensors are designed with a narrow field of view compared to the in-water version and provide 136 channels of Li and Lt data. 

The SAS can be mounted on a variety of vessels to provide continuous monitoring of ocean colour along the ship's track, on towers or other platforms to provide time series observations, or the system can be used for airborne remote sensing of ocean colour.

Applications:

  • Estimate concentrations of dissolved organic matter, suspended sediments, and chlorophyll
  • Bio-optical algorithm development and modelling
  • Satellite calibration and validation
  • Environmental monitoring
  • Data products include water leaving irradiance, remote sensing reflectance, and energy fluxes

Features:

  • Precision measurements of Li, Lt & Es
  • Adjustable viewing angles from Nadir to Zenith
  • Multiple radiometer options - multi, hyperspectral or combinations
  • Full ancillary suite - tilts, sea-surface temperature, GPS
  • Data logging and processing software included
     
 Irradiance in-airRadiance in-air
Field of View

Cosine

±3% 0-60º

10% 60º- 85º

(350-800 nm)

 

3º (FOV extension aperture)
Typical Saturation9 µW cm-2 nm-10.5 µW cm-2 nm-1  
SNR1.6 x 1041.6 x 104
Size

39.9 (cm) Height

6.0 (cm) Diameter

1.0 (kg) Weight

36.2 (cm) Height

6.0 (cm) Diameter

1.0 (kg) Weight

Operating Temperature-10 to +50º-10 to +50º

 

SatCon is a software utility for converting raw binary data, as logged by SatView, into readable ASCII text suitable for import by third party applications such as spreadsheets or databases. Data can be extracted in calibrated physical units or raw binary counts. SatCon can be operated interactively through a user friendly graphical interface, or in batch mode as a background process.

For minimum system requirements, installation instructions, and new features, please refer to the release notes in the SatCon User Manual.

Download SatCon 1.5.5

Released April 28, 2011
SatCon-1.5.5-b2-x86.exe for Microsoft Windows

ProSoft is an interactive graphical data processing and extraction application for Satlantic sensors. It is highly configurable with optional batch mode operation and a rich user interface. Supported data products include:

For minimum system requirements, installation instructions, and new features, please refer to the release notes and manual.

Download ProSoft 7.7.16

Released October 26, 2011

Prosoft 7.7.16 provides a number of key improvements including Windows 7 compatibility, corrected backscattering coefficient units, robust handling of corrupt timer data, HyperSAS IR camera integration, interruptable processing, and more. For a detailed list of recent fixes and features, please refer to the release notes.

ProSoft7.7.16_Setup.exe for Microsoft Windows
Product Data Sheet

HyperSAS Datasheet

Tuesday, November 18, 2014
2014_datasheet_HyperSAS.pdf
Product Manual

ProSoft 7.7 Manual

Satlantic ProSoft 7.7 Manual.

Thursday, May 5, 2011
ProSoft-7.7- Manual.pdf
Product Manual

SatCon 1.5 Manual

Satlantic SatCon 1.5 Manual.

Wednesday, March 9, 2011
SatCon-1.5-Manual.pdf
Product Manual

SatView 2.9 Manual

Satlantic SatView 2.9 Manual.

Thursday, October 2, 2008
SatView-2.9-Manual.pdf
Product Manual

SAS Manual

Wednesday, December 1, 2010
SAS-RevB-Manual.pdf

What are the main differences between Satlantic multispectral and hyperspectral radiometers?

Satlantic multispectral 500 series radiometers measure light at each fixed wavelength with an interference filter/detector assembly.  The analog output of each detector is amplified and digitized.  The amplification stage and noise filtering is fine tuned for each wavelength to produce an optimal saturation limit and frame rate.  This maximizes the signal to noise ratio while ensuring that each channel does not saturate during normal operations.  The frame rate of each radiometer is fixed anywhere between 1 and 24 Hz depending on the customers specific requirements.  4 and 7 channel radiometers can be purchased in several configurations with different field of views.  They have a small diameter to reduce self-shading and generate a digital output for stand-alone operations or they can operate as part of a larger 485 network of sensors (SATNet).  500 series sensors are also very low power devices making them excellent sensors for power limited platforms such as buoys, AUV’s and profiler floats.
 
Satlantic Hyperspectral HOCR radiometers use a Zeiss spectrograph optimally configured and characterized to measure light between 350 and 800 nm (approximately 136 individual channels).  With the HOCR series, a variable integration time is used for all channels in the array and upper and lower thresholds are set so that no channel saturates within that array.  Thermal dark current changes that occur within the spectrograph are corrected across the full spectrum with the use of a mechanical dark shutter that closes periodically in the radiometer.  A separate frame of data is generated for this dark reading.  Frame rates are dependent on the integration time of the device so are considered variable.  When light levels are high, the integration time and frame rate are also high, so that you are collecting many frames per second.  As the light level decreases, the integration time must increase and therefore the frame rate becomes longer.  Integration times range from 4 ms to 2 seconds.  HOCR sensors also have a small diameter to reduce self-shading and the same telemetry options are offered.  Satlantic also offers a low power, non-SATNet version of the HOCR sensor for remote platforms that are power limited.
 

What are SIP files?

Files that are delivered with Satlantic and third party equipment to describe the sensors data output and calibration coefficients come in two types. Calibration files or *.cal files and telemetry definition format files or *.tdf files. In some cases, systems are created that network many sensors together and their combined data is provided in one serial output.

The simplest example is a HOCR sensor that generates both light and dark frames. A more complex example is a HPROII profiling system that may contain as many as 5 sensors and 7 individual calibration and tdf files. These files must be used to both collect and process the data.

This can become quite confusing to keep track of all these files so Satlantic developed SIP files. All CAL and TDF files required for a system are zipped using winzip and the extension changed from *.ZIP to *.SIP. The file name includes the system description (usually the network master serial number) and the creation date. This SIP file can then be used in place of individual files to collect and process data.

  • Churnside, J.H., Wilson, J.J . (2008) Ocean Color Inferred from Radiometers on Low-Flying Aircraft. Sensors 08: 860-876
  • Schaeffer, B.A., Morrison, J.M., Kamykowski, D, Feldman, G.C., Xie, L, Liu, Y, Sweet, W, McCulloch, A, Banks. (2008) Phytoplankton biomass distribution and identification of productive habitats within the Galapagos Marine Reserve by MODIS, a surface acquisition system, and in-situ measurements. Remote Sensing of Environment 112 3044-3054 doi:10.1016/j.rse.2008.03.005
  • Kowalczuk, P, Durako, M.J., Cooper, W.J., Wells, D, Souza, J.J. (2006) Comparison of radiometric quantities measured in water, above water and derived from seaWiFS imagery in the South Atlantic Bight, North Carolina, USA. Continental Shelf Research 26: 2433-53.
  • Melin, F, Berthon, J, Zibordi, G. (2005) Assessment of apparent and inherent optical properties derived from SeaWiFS with field data. Remote Sensing of Environment 97: 540-53.
  • Berthon, J, Zibordi, G. (2004) Bio-optical relationships for the northern Adriatic Sea. International Journal of Remote Sensing 25: 1527-32.
  • Hooker, S, Lazin, G, Zibordi, G, McLean, S. (2002) An evaluation of above and in-water methods for determining water-leaving radiance. Journal of Atmospheric and Ocean Technology 19: 486-515.