Author: Nicholas R Colmenares (Nicholas.r.colmenares@nasa.gov)

Dear LLR Colleagues,

In late February 2024, there were two major data releases from APOLLO in CRD version 2 format – what follows is a description/clarification of the released data.

The first dataset’s normal points span from April 2006 through the end of 2020, representing a reprocessing of all pre-NASA data, and these were produced in Spring 2023 for a dataset characterization paper we’d been working on (https://iopscience.iop.org/article/10.1088/1538-3873/aceb2f)
but the release to ILRS was delayed. To clarify for the folks at the 2023 LLR conference - you might recall I mentioned this dataset at the conference, however I’d failed to recall the points hadn’t yet made it to the ILRS data centers and were only on Zenodo
at the time (https://zenodo.org/records/7818557).

The second set of released data contains new normal points from October 10 2023 through January 20 2024, and re-processed normal points (from December 19 2019 to October 10 2023) given updated calibration numbers for the current hardware
configuration. This set was produced in February 2024. There are 270 normal points present in both datasets between December 19 2019 through the end of 2020, given the overlapping period of time represented in each set.

The corresponding normal points may be found in the /slr/data/npt_crd_v2/[apollo11,apollo14,etc.]/ directories for CDDIS’s archive (https://cddis.nasa.gov/archive/) and/or using EDC’s data browser
(https://edc.dgfi.tum.de/en/data/browser/). Note: data prior to May 2012 has not yet made it to CDDIS’s archive at the time of this email but should be up there soon.

These two releases are considered to be the entire APOLLO dataset and are the most up-to-date versions of normal points. I.e., there may be normal points present now that were not before, and vice versa. Any normal points from prior releases
that are absent from the two releases described above are now considered invalid (not a real signal).

If there are any questions/concerns, please let me know (Nicholas.r.colmenares@nasa.gov).

Thanks,

------------------------------------------------------------

Nicholas Colmenares [he/him]

NASA Postdoctoral Fellow

ORAU/NASA GSFC, Code 61A

Nicholas.r.colmenares@nasa.gov