PDS LDN Data Review
7 December 2007
Review Summary

Apollo 14 and 15 Cold Cathode Ion Gage (CCIG)

Reviewers - John Freeman (telecon), Dana Crider (telecon)

There were difficulties setting up the Apollo 14 CCIG, did these affect
the results?   Note this in the dataset.cat  (Kent Hills says the
difficulties did not affect the results, the experiment was set up
pointed nearly vertically as planned.)

Change the wording on the description of the ordinate - note that it is
ALWAYS the same range and scale for the ordinate on all plots, in
dataset.cat. The scale was usually the same along the bottom, the ranges
were always different.

Add more detail about the daytime data being unreliable.  The instrument
was often turned off due to high temperature arcing.  This is in
instrument.cat file but should be added to dataset.cat.  Arcing was
often indicated by noisy temperature data. Also, daytime data was
swamped by outgassing.

Add a note on completeness of data - missing later years 1974 - 1975 (We
never received these data at NSSDC, don't know if they exist elsewhere.)

In table - data stop, file stop columns - fill columns if blank, easier
to read by computer (add comment where data and file stop are
different).

Clearly note N2 was used as reference gas (as opposed to N).

Second paragraph in Apollo 14 inst.cat file refers to Apollo 15
instrument, fix this paragraph.

Add a note that bursts shown in the nighttime data are probably real

Add a set of browse images so users can go through the images quickly
without downbloading the full images.

Add note on the later LACE instrument data (Apollo 17) - It had better
data. Also add notes on LOMS data.

Add reference to LACE and LOMS data and pointers to the references in
the dataset.cat file

Note that sunrise/sunset effects were observed and bursts were seen at
night, especially pre-dawn, which were thought to be argon-40 events, in
instrument.cat and  dataset.cat files.

Kent Hills may be able to get more information about how arcing and
outgassing affected the CCIG data from Dick Hodges.  We could send him
the cat files and some sample data and labels if he wanted to look it
over.

Apollo 15 indxinfo.txt-- couple of occurrences of "identifiies"

Apollo 15 insthost.cat - the sentence starting, "A radioisotope  . . ."
is missing a verb--probably insert "provided" before "the power"

A15A_CCIG_71_M04674.LBL - last object's NAME should be "COMMENTS",
penultimate object is named differently than in all the other
volumes--this one is "PLOT_END_TIME" whereas it is "FRAME_END_TIME" in
the other files

Apollo 14 indxinfo.txt-- couple of occurrences of "identifiies"

Apollo 14 insthost.cat - the sentence starting, "A radioisotope  . . ."
is missing a verb--probably insert "provided" before "the power"

Apollo 15 mission.cat-- one place says collected "76.6 kg" and "76.8 kg"
somewhere else.  (The number should be 76.8, change it to this.) But the
"official" number according to "Apollo by the Numbers" is 77.3 kg We
should check all the official numbers, don't know where the 76.8 value
came from.

Add a note on the image quality, enhancement of images is up to viewer.
A note to this effect is in the dataset.cat file, add it to the aareadme
file as well.

Include information on the solar zenith angle in the data set as a table
of zenith angle with data and time.

I'll ask John Freeman to take another look at these issues:

Files DATA/A15_CCIG_71_M04674.LBL and .TXT contain Apollo 14 instead of
Apollo 15 data. These look to be Apollo 15 data to me???

The Apollo 14 instrument description and other files were copied into
Apollo 15? I can't find this - all Apollo 15 files look fine  ???