Atmos Wiki

During ongoing aircraft field research in Florida in 2019, the aircraft's wing pitot sensor was found to be providing erroneous readings.

During the creation of the physical file, the process_all script consolidates the CIP pitot pressure into the wing pitot pressure spot; consequently, the anomalous data is utilized to generate the .basic.raw file.

The CIP pitot pressure is about 10 mb lower than the nose pitot pressure.

Connect to vpn.ndus.edu through Global Protect

Open and log into the Littlestorm server through PuTTY.

After logging in, type in the command: cd /nas/und/Florida/2019/Aircraft/CitationII_N555DS/FlightData

After going to the FlightData directory, look inside it for a subdirectory named after the specific date of flight you want to see. For instance, I chose the 20190803_142455 flight data to make changes.

After selecting the directory of interest, type: cd PostProcessing

Navigate to the .physical.raw.gz file.

First, if the file is compressed, meaning it is in .gz format, then decompress it using the command: gunzip 19_08_03_14_24_55.physical.raw

Once the file is in decompressed form, type: aplot 19_08_03_14_24_55.physical.raw

This command will open ADPAA Aplot.

Select 'Pitot_Wing' and then XY Plot

To look at the time interval of this flight, click the Tools tab located at the top of the bar.

Under the Tools section, click “Statistics”. A side window will be opened, which displays the X-span (time interval).

Notice the Minimum and Maximum time.

Under the File tab, go to the “Add Edit” option.

Type the minimum time as Start Time and the maximum time as End Time.

Type in the editor name

Select the parameter as Pitot_Wing

Then type in the reason for making the edit. For instance, I type “Not connected, negative values”

Click “Store Edit info”. This will create a .physical.edits file in the directory you are in.

Then go to the File tab and click on “Apply edits”. This will create a .physical.cleans file in the directory.

The .physical.cleans file will not contain the data from the Pitot_wing sensor.