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Building data files for archival at NASA SPDF | ||
============================================= | ||
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The codes and routines at :py:mod:`pysatNASA` are designed for end-users of NASA data | ||
products. However, pysat in general has also been used to build operational | ||
instruments for generating archival data to be uploaded to the Space Physics | ||
Data Facility (SPDF) at NASA. | ||
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In general, such instruments should include separate naming conventions. An | ||
example of this is the REACH data, where netCDF4 files are generated for | ||
archival purposes as part of the :py:mod:`ops_reach` package, but can be accessed by | ||
the end user through :py:mod:`pysatNASA`. | ||
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In general, a :py:class:`pysat.Instrument` object can be constructed for any | ||
dataset. Full instructions and conventions can be found | ||
`here <https://pysat.readthedocs.io/en/latest/new_instrument.html>`_. In the | ||
case of the REACH data, the operational code reads in a series of csv files and | ||
updates the metadata according to user specifications. Once the file is loaded, | ||
it can be exported to a netCDF4 file via pysat. In the simplest case, this is | ||
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:: | ||
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reach = pysat.Instrument(inst_module=aero_reach, tag='l1b', inst_id=inst_id) | ||
pysat.utils.io.inst_to_netcdf(reach, 'output_file.nc', epoch_name='Epoch') | ||
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However, there are additional options when translating pysat metadata to SPDF | ||
preferred formats. An example of this is | ||
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:: | ||
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# Use meta translation table to include SPDF preferred format. | ||
# Note that multiple names are output for compliance with pysat. | ||
# Using the most generalized form for labels for future compatibility. | ||
meta_dict = {reach.meta.labels.min_val: ['VALIDMIN'], | ||
reach.meta.labels.max_val: ['VALIDMAX'], | ||
reach.meta.labels.units: ['UNITS'], | ||
reach.meta.labels.name: ['CATDESC', 'LABLAXIS', 'FIELDNAM'], | ||
reach.meta.labels.notes: ['VAR_NOTES'], | ||
reach.meta.labels.fill_val: ['_FillValue'], | ||
'Depend_0': ['DEPEND_0'], | ||
'Format': ['FORMAT'], | ||
'Monoton': ['MONOTON'], | ||
'Var_Type': ['VAR_TYPE']} | ||
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pysat.utils.io.inst_to_netcdf(reach, 'output_file.nc', epoch_name='Epoch', | ||
meta_translation=meta_dict, | ||
export_pysat_info=False) | ||
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In this case, note that the pysat 'name' label is output to three different | ||
metadata values required by the ITSP standards. Additionally, the | ||
:py:attr:`export_pysat_info` option is set to false here. This drops several | ||
internal :py:mod:`pysat` metadata values before writing to file. | ||
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A full guide to SPDF metadata standards can be found | ||
`here <https://spdf.gsfc.nasa.gov/istp_guide/istp_guide.html>`_. | ||
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Other best practices for archival include adding the operational software version | ||
to the metadata header before writing. The pysat version will be automatically | ||
written to the metadata. | ||
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:: | ||
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reach.meta.header.Software_version = ops_reach.__version__ | ||
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A full example script to generate output files can be found at | ||
https://github.com/jklenzing/ops_reach/blob/main/scripts/netcdf_gen.py |
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Original file line number | Diff line number | Diff line change |
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@@ -28,10 +28,10 @@ | |
import functools | ||
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from pysat.instruments.methods import general as mm_gen | ||
from pysat import logger | ||
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from pysatNASA.instruments.methods import cdaweb as cdw | ||
from pysatNASA.instruments.methods import general as mm_nasa | ||
from pysatNASA.instruments.methods import iss as mm_iss | ||
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# ---------------------------------------------------------------------------- | ||
# Instrument attributes | ||
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@@ -49,34 +49,7 @@ | |
# ---------------------------------------------------------------------------- | ||
# Instrument methods | ||
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def init(self): | ||
"""Initialize the Instrument object with instrument specific values. | ||
Runs once upon instantiation. | ||
""" | ||
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ackn_str = ' '.join(('Data provided through NASA CDAWeb. Contact', | ||
'[email protected] for support and use.')) | ||
logger.info(ackn_str) | ||
self.acknowledgements = ackn_str | ||
self.references = ' '.join(('V. N. Coffey et al., "Validation of the', | ||
'Plasma Densities and Temperatures From', | ||
'the ISS Floating Potential Measurement', | ||
'Unit," in IEEE Transactions on Plasma', | ||
'Science, vol. 36, no. 5, pp. 2301-2308,', | ||
'Oct. 2008,', | ||
'doi: 10.1109/TPS.2008.2004271.\n', | ||
'A. Barjatya, C.M. Swenson, D.C.', | ||
'Thompson, and K.H. Wright Jr., Data', | ||
'analysis of the Floating Potential', | ||
'Measurement Unit aboard the', | ||
'International Space Station, Rev. Sci.', | ||
'Instrum. 80, 041301 (2009),', | ||
'https://doi.org/10.1063/1.3116085')) | ||
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return | ||
init = functools.partial(mm_nasa.init, module=mm_iss, name=name) | ||
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# Use default clean | ||
|
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# -*- coding: utf-8 -*- | ||
"""Provides non-instrument specific routines for C/NOFS data.""" | ||
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ackn_str = ' '.join(('Data provided through NASA CDAWeb Key Parameters -', | ||
'Shin-Yi Su (Institute of Space Science, National Central', | ||
'University, Taiwan, R.O.C.)')) | ||
refs = {'ivm': ' '.join(('Yeh, H.C., S.‐Y. Su, Y.C. Yeh, J.M. Wu, R. A.', | ||
'Heelis, and B. J. Holt, Scientific mission of the', | ||
'IPEI payload on board ROCSAT‐1, Terr. Atmos. Ocean.', | ||
'Sci., 9, suppl., 1999a.\n', | ||
'Yeh, H.C., S.‐Y. Su, R.A. Heelis, and J.M. Wu, The', | ||
'ROCSAT‐1 IPEI preliminary results, Vertical ion', | ||
'drift statistics, Terr. Atmos. Ocean. Sci., 10, 805,', | ||
'1999b.'))} |
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# -*- coding: utf-8 -*- | ||
"""Provides non-instrument specific routines for C/NOFS data.""" | ||
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ackn_str = ' '.join(("R.M. Suggs, S.L. Koontz, NASA Johnson Space Center", | ||
"Contact Rob Suggs for support and use.", | ||
"[email protected]. Please acknowledge the data", | ||
"providers and CDAWeb when using these data.")) | ||
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refs = {'fpmu': ' '.join(('V. N. Coffey et al., "Validation of the Plasma', | ||
'Densities and Temperatures From the ISS Floating', | ||
'Potential Measurement Unit," in IEEE Transactions', | ||
'on Plasma Science, vol. 36, no. 5, pp. 2301-2308,', | ||
'Oct. 2008, doi: 10.1109/TPS.2008.2004271.', | ||
'\n', | ||
'A. Barjatya, C.M. Swenson, D.C. Thompson, and K.H.', | ||
'Wright Jr., Data analysis of the Floating Potential', | ||
'Measurement Unit aboard the International Space', | ||
'Station, Rev. Sci. Instrum. 80, 041301 (2009),', | ||
'https://doi.org/10.1063/1.3116085', | ||
'\n', | ||
'Debchoudhury, S., Barjatya, A., Minow, J. I.,', | ||
'Coffey, V. N., & Chandler, M. O. (2021).', | ||
'Observations and validation of plasma density,', | ||
'temperature, and O+ abundance from a Langmuir', | ||
'probe onboard the International Space Station.', | ||
'Journal of Geophysical Research: Space', | ||
'Physics, 126, e2021JA029393.', | ||
'https://doi.org/10.1029/2021JA029393')) | ||
} |
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