I am new to spectroscopy, so I am not sure how my questions are perceived. I just want to make sure that I am not lost, so any kind of suggestion is welcome.

I am interested in the infrared absorption spectrum of molecular nitrogen and oxygen. I thought it would be more streamlined to obtain this information, but it is not easy as I thought. 

What I did is, I went to the HITRAN database and downloaded the line strengths of both $\ce{N2}$ and $\ce{O2}$, and I extracted the $\texttt{.par}$ file, and I am able to see some obvious peaks. 

I also have a range of interest for both temperature (~70-300 K) and pressure (~300-3000 Pa), but I don't know where to start. 

Another point of confusion for me is as follows: On the NIST [page][1] for $\ce{CO2}$, the is a section titled "IR spectrum", which clearly shows absorption/emissions spectrum of $\ce{CO2}$. However, such a section does not exist for [nitrogen][2] or [oxygen][3]. Why is there no section for this?

How do I go about finding absorption spectrum for $\ce{N2}$ and $\ce{O2}$ in my range of interest? Should I simply google keywords and try to see if I can find what I find on Google image search?

  [1]: https://webbook.nist.gov/cgi/cbook.cgi?ID=C124389&Units=SI&Type=IR-SPEC&Index=1#IR-SPEC
  [2]: https://webbook.nist.gov/cgi/cbook.cgi?ID=C7727379&Mask=608
  [3]: https://webbook.nist.gov/cgi/cbook.cgi?ID=C7782447&Mask=1000