This pages gathers fire observation from a fieldwork campaign organized in Kruger National Park in 2014. It was organized by Navashni Govender (South African National Parks), Martin Wooster (Kings College London), Wilfrid Schroeder (NOAA), Gernot Rucker (Zebris Geo-IT) and Anja Hoffman (GOFC Regional Networks).
Helicopter-borne images were collected for 4 savannah prescribed burns using a handheld camera mount operating 3 cameras:
- an Optris P400, a Long Wave Infra Red (LWIR) camera
- an Agema 550, a Middle Infra Red (MIR) camera which does not see temperature below 470K.
- and a Gopro Hero camera, hereafter the visible (VIS) camera which shows here gray scale images.
Follows an overview of the orhtorectified images processed with a suite of algorithms specifically designed for airborne fire observation collected at high frequency. The main requirement are: the camera points towards the plot along a near constant direction, scene background around the plot are kept as much as possible in the field of view, and the plot can be approximated as a plan surface.
Shabeni 3
Shabeni3 is a 7.4 ha plot burnt on the 22th of August 2014. Ignition starts at 10:00 UTC and last for 25 minutes.
| LWIR | MIR | VIS | |
|---|---|---|---|
| % image removed | 7.8 | 13.5 | 0 |
| ortho dx (m) | 1.0 | 1.0 | 1.0 |
| ortho fps stats (Hz) | |||
| min | 0.12 | 0.16 | 0.5 |
| 5% perc. | 1. | 1.48 | 1 |
| median | 2. | 2.97 | 2 |
| max | 3.0 | 3.0 | 3 |
Note: slow moving back fires followed by one intense front merging; LWIR images are slightly blurred. Clik menu below to expand.
LWIR Orthorectified Images animation
MIR Orthorectified Images animation
Interactive plot: 3 bands (LWIR,MIR,VIS) Orthorectified Images
Shabeni 1
Shabeni1 is a 8.2 ha plot burnt on the 22th of August 2014. Ignition starts at 12:00 UTC and last for 20 minutes.
| LWIR | MIR | VIS | |
|---|---|---|---|
| % image removed | 10.3 | 6.6 | 0 |
| ortho dx (m) | 1.0 | 1.0 | 1.0 |
| ortho fps stats (Hz) | |||
| min | 0.11 | 0.21 | 1. |
| 5% perc. | 0.33 | 1.31 | 1 |
| median | .5 | 2.32 | 2 |
| max | 1.0 | 2.39 | 3 |
Note: intense fire, with 2 spotting ignition outside the plot. Clik menu below to expand.
LWIR Orthorectified Images animation
MIR Orthorectified Images animation
Interactive plot: 3 bands (LWIR,MIR,VIS) Orthorectified Images
Skukuza 6
Skukuza6 is a 7 ha plot burnt on the 26th of August 2014. Ignition starts at 09:59 UTC and last for 18 minutes.
| LWIR | MIR | VIS | |
|---|---|---|---|
| % image removed | 11.6 | 2.3 | 0 |
| ortho dx (m) | 1.0 | 1.0 | 1.0 |
| ortho fps stats (Hz) | |||
| min | 0.12 | 0.3 | 1. |
| 5% perc. | 0.5 | 2.34 | 1 |
| median | 1.0 | 2.36 | 2 |
| max | 2.0 | 2.39 | 2 |
Note: Multiple ellipsoidal fronts; weak fire, in particular on the east side (right side of the video). Clik menu below to expand.
LWIR Orthorectified Images animation
MIR Orthorectified Images animation
Interactive plot: 3 bands (LWIR,MIR,VIS) Orthorectified Images
Skukuza 4
Skukuza4 is a 4.3 ha plot burnt on the 26th of August 2014. Ignition starts at 12:26 UTC and last for 11 minutes.
| LWIR | MIR | VIS | |
|---|---|---|---|
| % image removed | 12.7 | 3.34 | 0 |
| ortho dx (m) | 0.5 | 0.5 | 0.5 |
| ortho fps stats (Hz) | |||
| min | 0.11 | 0.4 | 0.5 |
| 5% perc. | 0.5 | 2.9 | 1 |
| median | 1.0 | 2.97 | 2 |
| max | 1.0 | 3.01 | 3 |
Note: smoky plume and large front depth. Clik menu below to expand.
LWIR Orthorectified Images animation
MIR Orthorectified Images animation
Interactive plot: 3 bands (LWIR,MIR,VIS) Orthorectified Images