add memory check

[kkappler]

Address issue #249 as requested by IRIS / Earthscope

[codecov[bot]]

Codecov Report

Merging #250 (990e1ad) into tfkernel (dfeebce) will increase coverage by 0.03%. The diff coverage is 89.47%.

@@             Coverage Diff              @@
##           tfkernel     #250      +/-   ##
============================================
+ Coverage     78.78%   78.81%   +0.03%     
============================================
  Files           102      102              
  Lines          5726     5744      +18     
============================================
+ Hits           4511     4527      +16     
- Misses         1215     1217       +2     

Impacted Files	Coverage Δ
setup.py	0.00% <ø> (ø)
aurora/pipelines/transfer_function_kernel.py	92.17% <89.47%> (-0.61%)	:arrow_down:

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