Find the time and place of the next hotspot update on NAFI|
Searching hotspot updates
The hotspots displayed on NAFI are detected by satellites that pass across the country in regular orbits, typically producing a few updates every
day for a given fire on the ground. To find out when the next satellite pass over an area will be, and when it should get a hotspot update,
you can use the following links:
The Sentinel Dashboard,
provided by Landgate WA, shows the latest fire data from national sources, which NAFI also sources (but provides its own fire scar data). A useful image on the dashboard show
the next expected hotpot pass (below). The grey strips are the paths of the satellites and the size of the area they detect fires in. So at this particular time, the next hotspots due are from a SUOMI NPP satellite pass in less than an hour across eastern and central
Australia. The hext hotspots are then from a NOAA 19 satellite pass in five hours time covering some more of the west. It usually takes between 30 minutes and 2 hours for the satellite detection to be processed at downlink stations and sent to NAFI for display - so
this time needs to be added on. The dashboard also displays the last hotspot passes in a similar way.
The wavy line graph below the images shows the number of passes, for each type of satellite sensor, that should be picked up by each downlink station on a given date.
The Daily Satellite Passes site,
provided by Geoscience Australia, allows you to view a range of upcoming satellite passes. By selecting a combination of satellite type, date, time and downlink station at top left
(red rectangle) and then clicking on the tables entries generated below, you can view the pass areas for these settings on the map. Again, you need to bear in mind there will usually be a 30 minute to 2 hour delay between the satellite detecting a fire and the hotspot
appearing on NAFI.
It can be useful to refer to the frequently-asked questions of the data used by NAFI here