SAS Above Water Optical System
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. See the SAS Solar Tracker product page for more information.
- 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
- 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-air||Radiance in-air|
|Field of View|
10% 60º- 85º
|3º (FOV extension aperture)|
|Typical Saturation||9 µW cm-2 nm-1||0.5 µW cm-2 nm-1|
|SNR||1.6 x 104||1.6 x 104|
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
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:
- Diffuse attenuation coefficient
- Solar utilities
- Photosynthetically available radiation
- Pigment modeling
- Energy fluxes
- Water leaving radiance
- Reflectance data products
- Normalized water leaving radiance
- Water properties
For minimum system requirements, installation instructions, and new features, please refer to the release notes and manual.
Download ProSoft 7.7.19
ProSoft 7.7.19 provides a number of key improvements including support for ancillary SAS sensors, support for BETA_IRED and BETA_GREEN sensors to calculate backscattering, 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.
What are the main differences between Satlantic multispectral and hyperspectral radiometers?
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.