February 2020 New Horizons Review
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SWAP KEM1 v2.0 Liens
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Reviewers: Rudy Frahm, Steve Joy
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file: dataset.cat
--> The Data Set Overview begins by discussing Pluto. New Horizons has moved way
beyond Pluto and this dataset is describing the first encounter with a Kuiper
Belt object (KBO). The science should reflect the fact that SWAP is measuring
the solar wind in the area of the KBO. Although not technically incorrect, the
emphasis should be on KBO and not on Pluto.

--> Update text to include leapsecond at the end on December 2017. Review all
New Horizons trajectory information to determine the influence and if
reprocessing trajectory information is necessary.

file: nk_kem.cat
--> voldesc.cat gives an end date for this mission phase as
2019-01-30T00:08:02.176. This end date was just over a year ago. Yet nh_kem.cat
do not yet show an end date ("TBD"). In addition, the PEPSSI data do not exceed
the date given in voldesc.cat. However, 2021-09-30 is the MISSION_STOP_DATE for
the mission given in thsi file. Please correct these inconsistencies.

file: nhsc.cat
--> This document needs to be updated. There are references to measurements at
Pluto in numerous places. The instrument description gives no confidence that the
New Horizons instruments can measure properties of a KBO.

file: swap_cal.pdf
--> The sentence "7 Figure 5: Diagram defining the roll (φ) angle. The view is
looking at the top of the instrument towards the spacecraft." reads oddly, so a
comparison of this document with that from the kemcruise1 phase was performed.
This comparison shows that the underlined text was inserted in the middle of the
old sentence. It is assumed that this text was inserted by accident and should
be removed.

--> In addition, the Roll angle is defined in Figure 11 whereas Figure 5 is the
variation in the ESA response width with respect to the Azimuth.

--> Caption of Figure 8 is not on the same page as the Figure. In addition, the
axis labels of Figure 8 need to be enhanced since they are almost unreadable.

--> Figure 10 is not called out in the text and is a graphical representation of
the azimuth angle definition. Figure 11 is not called out in the text and is a
graphical representation of the roll angle definition. Both of these figures are
necessary in this document and should be called out and described in the text.

--> Figure 6 is the voltage variation of the CEMs, but the text for Figure 6
describes Figure 9. Please update.

file: soc_inst_icd.pdf
--> This document should be updated with the proper pros to indicate that SOC
processing continues beyond Pluto and what changes if anthing. There are odd
items which seem to be missing, like the last entry in the CEM Gain Test list in
Table 14-1 is in 2008. The last reference given in section 14.11, SWAP
Publications To Date, looks like it has not been updated since 2010. Additional
information about operation post the Jupiter encounter is lacking, including
information about the current operation and processing of the SWAP by the SOC.
This document needs to be examined and updated accordingly.

file: catinfo.txt
--> Might consider updating http://pds.jpl.nasa.gov to use https.

DATA

file: data_summary_plots/swap_010day_201812242359.png
--> 10 day data_summary_plots show no data at encounter, but science data shows
much more data. Summary plots should be updated.

--> 2018 SWAP data are fairly continuous until about day 300 (Nov) and then they
are mostly missing, as are the data after the Arrokoth flyby on 2019-01-01.
Presumably these data were acquired but were not returned in time to make this
review.

Strong Recommendations:
1) Add a little more detail to the "Version" section of the dataset.cat files
that explains what data were acquired in the KEM1 phase that were not returned
in time to be included in this version of the dataset. Most of the realtime data
from Nov 2018 to the end of Jan 2019 are missing. It's not clear if these data
were acquired but not downlinked in time or never acquired.

2) Somewhere in the documentation (nh_kem.cat, maybe elsewhere) the details of
the timing and geometry of closest approach should be defined (user shouldn't
have to go to Google). Similarly, there should be some mention of "common names"
including Ultima Thule and Arrokoth.

Certification: Certified w/ minor liens.