<div dir="ltr">Hello all ...<div><br></div><div>I am interested in hearing from anyone/everyone who uses the obs_def_upper_atm_mod.f90</div><div><br></div><div>I need to know who is using it - for what kinds of observations - and where those observations come from (so I can test my changes).</div><div>I'm trying to ensure the forward operators for</div><div><br></div><font face="monospace, monospace">SAT_RHO, KIND_DENSITY<br>GND_GPS_VTEC, KIND_GND_GPS_VTEC<br>CHAMP_DENSITY, KIND_DENSITY<br>MIDAS_TEC, KIND_VERTICAL_TEC<br>SSUSI_O_N2_RATIO, KIND_O_N2_COLUMN_DENSITY_RATIO</font><div><br></div><div><div>work correctly across a variety of models. To do this, I need to know the units of the observations,</div><div>and ensure that the models provide <span style="font-family:monospace,monospace">get_expected_upper_atm_density(),</span></div><div><span style="font-family:monospace,monospace">get_expected_vtec(), </span><span style="font-family:monospace,monospace">get_expected_gnd_gps_vtec(), and </span><span style="font-family:monospace,monospace">get_expected_O_N2_ratio()</span></div><div>the proper quantities. I have no reason to believe they are wrong, but the way they are written now</div><div>prevents TIEGCM from assimilating <span style="font-family:monospace,monospace">GND_GPS_VTEC observations.</span></div><div><br></div><div>I also don't know if anyone is using 'CHAMP_DENSITY' observations, particularly since the </div><div>observations/CHAMP/CHAMP_density_text_to_obs.f90 converter creates 'SAT_RHO' observations.</div><div><br></div><div>If you, or anyone you know, is using or is planning on using obs_def_upper_atm_mod.f90, I'd like to hear from you.</div><div><br></div><div>Thanks -- </div><div><br clear="all"><div><div class="gmail_signature"><div dir="ltr">Tim Hoar<div>Data Assimilation Research Section<br><div>Institute for Mathematics Applied to Geosciences</div></div><div>National Center for Atmospheric Research</div><div><a href="mailto:thoar@ucar.edu" target="_blank">thoar@ucar.edu</a></div><div>303.497.1708</div></div></div></div>
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