1. How can remote sensing help in searching of MH370?
Remote sensing can help to search for MH370 over the air and sea due to the application of satellites. Satellites can be used to capture images of the surface of the Earth of where the plane is estimated to have passed by. Images can also be taken in fixed intervals at certain places so that the place is well observed. Images taken can be processed using the application of GIS, which is able to provide the exact coordinates, given that the map of the Earth is present. Besides, remote sensing helps in searching efficiently because it can search at a large area at once and take only a short time. Therefore, remote sensing can save searching time as it can get images of places where people reported to have seen the place without having the rescue team to go in person, which will take more time.
2. Cell value profiles windows. How it works and what it shows.
Cell value is the value of a particular data in each cell or grid, normally known as pixel as well, of an image. It shows also values of each cell or grid of each band in a multi-bands image. Cell values can be of high resolution or of low resolutions depending on the satellites. By selecting a particular area desired, values of each cells according to bands will be shown. Below is attached with the figure of the values of cells by randomly selected point.
Figure 1 shows the cell values of a randomly selected point. |
3. Traverse profiles. How it works and what it shows.
Traverse shows the profile of different lines. Different lines can be formed according to the desire of the user on what he or she wants to interpret of the image. When a line is formed, a graph will be shown and it can be changed into different bands, and graphs will change accordingly. Many lines can be formed and line profiles can be viewed and compared easily. Below attached are images of some steps of viewing traverse profiles.
Figure 3 shows the lines and its profiles. |
4. Scattegrams. How it works and what it shows.
Scattegram image is a profile of data which shows the correlation between different bands. Correlation between two bands can be shown by the plotting of X-axis and Y-axis. The region with red colour in the image represents the correlation of two selected bands. The larger the red region, the more is the correlation between the two bands. Below attached are pictures showing how scattegram image works.
Figure 5 shows the correlation between band 4 and band 5. |