Project 2004-125 ACME

Airborne Carbon in the Mountains Experiment

Principal Investigator(s):   David Schimel, et al.

NSF/NCAR C-130Q Hercules (N130AR)

RAF Logo, 5,367 byte png

Documentation Summary

This site has the final documentation for the airborne measurements obtained from the NSF/NCAR Research Aviation Facility (RAF) C-130Q Hercules aircraft (Tail Number N130AR) during the ACME (Airborne Carbon in the Mountains Experiment) project which took place from 14 May through 2 August 2004.

Both the Low-Rate (LRT, 1 sample per second) and High-Rate (HRT, 25 sps, mixed) production data sets are available on-line at the URLs:

If this access method is unacceptable, data orders may be directed to the RAF Data Manager, Ron Ruth, phone: (303)497-1084. Access is also possible through individual scientist accounts with the NCAR Scientific Computing Division.

Both the raw and production output data have been archived to the NCAR/SCD Mass Store System (MSS) which has proven to be extremely reliable. However, we strongly urge data recipients to make their own archival copies to protect against damage or loss.

Software for viewing the Low- and High-Rate data is available from the RAF. Please consult the RAF Software Product Guide for more information on available RAF data-perusal programs.

As you proceed with analysis of your data, you may have questions, encounter problems, or uncover discrepancies or other aspects of the data set that may be of interest to the RAF and to other users. We ask that you bring these issues to the attention of the Project Manager or the RAF Manager.

Jørgen Jensen, (303)497-1028, ACME Project Manager
Jeffrey L. Stith Ph.D, (303)497-1032, Research Aviation Facility Manager
FAX phone number: (303)497-1092
Mail address:
National Center for Atmospheric Research
EOL/Research Aviation Facility
P. O. Box 3000
Boulder, CO 80307-3000
U. S. A.

We are pleased to serve as major providers of information to the ACME program and look forward to assisting you and the other investigators as the analysis of those data proceeds. If I can be of further help, please do not hesitate to call.


Jeffrey L. Stith, Ph.D.
Manager, Research Aviation Facility

On 3 October 2006 the production flight-level, low-rate netCDF files were updated by adding CO and CO2 measurements:

XCOMR:   Raw CO Mixing Ratio (V) (units should be ppm)
XCO2MR:   RAF CO2 Concentration (ppb)
XCO2ST:   RAF CO2 Status (Vdc)
These new data files have replaced the original files in the RAF archive and can be retrieved from the RAF Data Catalog as before. (For example, see the URL:

RAF Home Page | EOL Home Page | NCAR Home Page

Last update: Mon Oct 9 21:15:45 GMT 2006