This week has been the inception of all programs. Before I explain this overused movie reference, here is some introduction first.
The dataset I am using is mostly collected from five stations around the SF bay area that collect magnetic and electric field data. Some of these stations have been collecting data from the 1990's. The website I posted on my last blog only allowed you to view the data, but there is an interesting process into actually downloading and manipulating the data, which are completely unfiltered and untouched. I need to understand these data because on June 23, we will be testing the Jerrattizer (our new analog to digital converter).
On to the overused movie reference: In order to download the data, one must first open the program Typhoon. Then, with Typhoon, one can open Unix. Then, with Unix, one can open Matlab. Finally, with Matlab, one can open Karl's software, hence, the Inception reference. It is a bit of a hairy process to download the data, but it's not as difficult as it sounds. Apparently, we are the only ones that can access this data because Karl's software was made just for this dataset and these stations. So Karl was the one to design this program to be able to download data, but Karl's software can do some cool things like,
Plot a frequency spectrum:
This spectrogram is of one electrode over three days at the Jasper Ridge site at Stanford. BART (the train that runs through SF bay area) adds a significant amount of noise to the data as seen by the peaks during the day when BART is running.
However, I must produce these same plots but in Matlab because on June 23, we are testing the Jerrattizer. It is the goal of my project to compare our own homegrown analog to digital converter (costing about $2,000) with an expensive Quanterra (costing about $25K) that the stations are currently using. With a cheaper and homemade converter, there is more room for error and the chance for more noise to enter the system. Therefore, we are hoping that the quality of the Jerrattizer can be up to par with the Quanterra. There are some other projects going on too that I may end up helping with such as, calibrating the magnetic coils and converting our digital data into real units such as nanoTesla and Volts.
Till next time!
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