Sentinel hotspots are derived from Moderate Resolution Imaging Spectroradiometer (MODIS) sensors on board Terra (morning pass) and Aqua (afternoon pass) satellites. Images are captured, over a given point at least four times a day, between the two satellites, each with a ground swath of 2330 km and day/night coverage.
The Fractional Cover (FC) algorithm was developed by the Joint Remote Sensing Research Program and is described in described in Scarth et al. (2010). It has been implemented by Geoscience Australia for every observation from Landsat Thematic Mapper (Landsat 5), Enhanced Thematic Mapper (Landsat 7) and Operational Land Imager (Landsat 8) acquired since 1987. It is calculated from surface reflectance (SR-N_25_2.0.0).
The full SENTINEL-2 mission comprises twin polar-orbiting satellites in the same orbit, phased at 180° to each other. The mission carries optical sensors and monitors variability in land surface conditions.
The main objective of the SENTINEL-3 mission is to measure sea surface topography, sea and land surface temperature, and ocean and land surface colour with high accuracy and reliability to support ocean forecasting systems, environmental monitoring and climate monitoring.
These are the rawest level instrument data from the VIIRS satellite sensor (http://npp.gsfc.nasa.gov/viirs.html). They are pre-calibration, so are unique and should never change. As processing algorithms and instrument calibration evolve, they can be applied repeatedly to these data to produce useful physical products. This avoids repeated download of the product data from the US.
The NOAA/AVHRR sensor series has been operating since the 1980s. It is the longest-running daily 1km imagery data set globally. Full resolution data is only available via direct broadcast from the spacecraft at the time of overpass. Multiple state and federal agencies have been acquiring the data in this manner with reception stations in Hobart, Melbourne, Perth, Alice Springs, Darwin and Townsville.
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is a sensor onboard the Terra satellite, launched in December 1999. The Terra satellite also carries the MODIS sensor and follows a similar orbit to Landsat 7.
Pléiades 1A and Pléiades 1B operate as a constellation in the same orbit, phased 180° apart.
The identical twin satellites deliver very-high-resolution optical data products in record time and offer a daily revisit capability to any point on the globe.
The Advanced Land Observing Satellite (ALOS) developed by the Japan Aerospace Exploration Agency (JAXA) was launched in 2006 and is a high resolution satellite owned and operated by RESTEC. The satellite has three sensors i.e. two optical imagers (PRISM and AVNIR-2) and an L-band synthetic aperture radar (PALSAR - see the RADAR page for more information). The Advanced Visible and Near Infrared Radiometer Type 2 (AVNIR-2) has a cross track pointing function with off-nadir pointing capability from -44 to +44 degrees.
Registered & Notified Indigenous Land Use Agreements – (as per s. 24BH(1)(a), s. 24CH and s. 24DI(1)(a))
