| Region |
Mapping Period |
Comment |
| QLDN |
01/12/08 - 06/12/08 |
cloudy over tip and east coast |
Fire scars are processed and uploaded every week in the northern fire season, subject to availability of adequate satellite imagery. The most recent mapping is listed above. Mapping Period indicates the dates of the two images used to map fire scars. When there is cloud cover for long periods mapping may be delayed or only partially completed pending availability of clear imagery. Queensland is mapped in two regions: QLDN (north) and QLDS (south), divided at approximately 20 degrees south.
Mapping of fire scars in southern Queensland is not as reliable as in the northern part of Australia. For much of the year fire scars in southern Queensland are not easy to see in the satellite imagery because they are very small or because foliage is too dense. In this thicker vegetation, fires do not expose as much bare ground as they do in northern Australia, making the distinction between burnt and unburnt vegetation very difficult.
Hotspots acquired and uploaded during last 24 hours. See notes below for explanation of columns
| Pass No. |
Source filename |
Source |
Acquired |
Uploaded to NAFI |
Hotspots |
| |
| This is a unique identifier for each upload and can be used to display all the hotspots for a particular satellite pass using the VIEW PASS tool above the map. It should also be used when reporting any issues with hotspots. |
| NOAA source files are acquired from Landgate. There filename consists of a date/time in yyyymmddhhmm (e.g. 200510270529) followed by a letter identifying the download station: C - Crib Point; D - Darwin; M - Melbourne; P - Perth; T - Townsville; X - Murdoch. The time in these filenames is the starting time of the acqusition from the satellite and is in WST (West Australian Standard Time). |
| Landgate MODIS filenames take the form of a letter followed by a date/time in yyyymmddhhmm. The letters indicate the download location: A - Alice Springs; H - Hobart; P - Perth. The time in the filename indicates the start time of acquisition and is in WST. |
| Sentinel MODIS filenames indicate the MODIS satellite (Aqua or Terra) followed by a date/time in yyyymmddThhmmssZ where T and Z are constants. The time in the filename indicates the start time of the acquisition and is in UTC (Universal Coordinated Time) which is equivalent to Greenwich Mean Time. |
| Hotspot data is acquired from WA Landgate and Geoscience Australia. Users will notice that there can be duplication in the data received from these sources. This redundancy reduces the risks to NAFI of not acquiring data if one source fails for a time. |
| This is the date and time of the start of the acquisition adjusted to CST (Central Standard Time) to make comparison easier. The time for a pass is about 15 minutes following which the data is transferred to a processing centre, processed and then distributed. This process takes about an hour depending on many variables. |
| This is the CST date/time of upload to the NAFI database at which time the data can be displayed by users on the NAFI mapviewer. This is also the point at which any hotspot notifications are emailed out. Sometimes data is delayed in transfer or processing before arriving at NAFI which can give rise to variations in the elapsed time from acquisition to upload. |
| The number of hotspots provides some indication of the level of fire activity during a satellite pass. It is not necessarily an indication of fire activity across the whole of north Australia as the swathe of the the satellite pass might only cover part of the continent or there may be cloud cover in some areas. |
|