Unstable Approach Detection and Analysis Based on Energy Management and a Deep Neural Network

Round 1

Reviewer 1 Report

Comments:

Table 1: Direction / aircraft heading with magetic north to be zero degree

Table 2: Visibility / a measure of the opacity of the atmosphere / at what place in this context?

Table 2: Crosswind / the wind direction ….

Table 2: CB/TCU parts / here the conjunctions with and without are used interchangeably

Table 5: last line: Flight path angle deviation

Table 12: for clarity, it is better to adjust the table so that all clusters are next to each other

Figure 3-8 and 11:
Why is the increasing distance used on the x-axis as the plane logically approaches the runway? It would therefore make more sense to reduce the distance to the runway threshold in the direction of the x-axis (direction of flight), regardless of the fact that distances in aviation are given (as opposed to altitudes) rather in nautical miles, than in what units are the normalized energy calculated (missing in the description of the y-axis)

Figure 10a/b:
The picture is confusing, it is not clear how the individual clusters differ from each other, the use of black color for outliers is not appropriate (they are not clear visible), further, without indicating the standard instrument arrival routes for the runway 10 in Taipei airport, the picture does not make enough sense to the reader

 

Formulas (1) – (3):
According to which adjustment was the mass omitted from the equations for calculating the combination of kinetic and potential energy, and in what units is the energy calculated based on these formulas?

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Dear Authors,

Thank you for your interesting contribution. It looks like a huge amount of effort has been put into the project. You also used the publicly available data only from Flightradar24, which seems to be quite a brave approach regarding the quality of this data.

I regret to say that at the current stage, I had to halt your paper because of the remarks below:

Re: title

The title does not correspond with the content. The paper describes the methodology, design and development of the algorithm, criteria, and learning process. However, there is almost nothing about the practical application. You say: Unstable approach detection. Ok, but I could find no analysis of the actual approach saying: it was unstable, here, here, because of, the influential factors were, etc.

I propose to either change the title to reflect the actual content (easier), or add an example (more demanding). After design and learning, I believe you made many tests, so one or two results with descriptions could be interesting.

Re: conclusions

The first fourteen lines of Chapter 5 repeat the abstract, so this part is redundant.

I do not get the first bullet point. How does energy management provide different points of view? What are these points (if really plural)? You should probably rephrase it.

Best regards

Your reviewer

 

You may want to check grammar in some places.

Aircraft is singular and plural.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf