[teqc] So long, partner. Gotta make tracks. (which here in the great American West means "Goodbye")

Arif arif.aditiya at big.go.id
Fri Mar 1 03:04:38 MST 2019

Dear Lou,

Words cannot express how much efforts you’ve done for GNSS Community.
Thanks for a lot of your works.

Good luck for your next journey.


----- On Feb 28, 2019, at 9:58 PM, Uwe Hessels uwe.hessels at bkg.bund.de wrote:

| Dear Lou,
| thank you very much for teqc and your permanent uncomplaining support.
| All the best for your next phase of life..
| Kind regards, Uwe.
| Am 28.02.2019 um 15:39 schrieb Lou Estey:
|>        Farewell!  Adieu!  Auf Wiedersehen!  Au revoir!  Прощай!
|>       Adios!  さようなら!  再見!  Tchau!  Ha det!  Farvel!  Ciao!
|> Today is my last day at UNAVCO.  At long last, I'm retiring!
|> Designing, developing, extending, and maintaining teqc (which didn't even have a
|> real name
|> for most of its first year in 1996!) was only a part of my job, but even so it
|> has been an
|> exceptional honor and privilege to provide support to a world-wide community of
|> users for
|> over 23 years -- which, among other things, spanned two full Solar Cycles (23
|> and 24),
|> seven leap second insertions, and, after GPS, SBAS, and GLONASS, the addition of
|> four more
|> GNSS constellations.  Talk about a wild ride.
|> Although a few of its stars are now gone, this project of course would have been
|> impossible
|> without another constellation -- that being one of people:
|> at UNAVCO:
|> - Chuck Meertens -- who thought I might be able to "make life better" for the
|> GPS user
|> community and hired me and then served as a vital "impedance to think into" over
|> the years
|> as we pondered and ironed out ideas together;
|> - Chris Rocken, Jim Johnson, John Braun -- the core of the original Fortran QC
|> authors,
|> who provided much needed helpful feedback and constructive criticisms about the
|> qc code
|> component during its initial transformation from their Fortran code to my C
|> code;
|> - Myron McCallum -- who understood that a universal tool that could read a wide
|> suite
|> of raw GPS formats and write out RINEX as well (in addition to performing a
|> quality
|> check on it all) would be a huge boon to the UNAVCO GPS archive project;
|> - Stuart Wier -- who worked on the preliminary GLONASS orbit code and wrote the
|> bulk of the current PDF teqc tutorial;
|> - Freddy Blume, Henry Berglund, and many other UNAVCO engineers -- who tested,
|> suggested,
|> provided feedback, complained (?), etc. through the years;
|> - Sarah Doelger -- who also provided the same great UNAVCO engineering support
|> as above,
|> plus was of immense help in proofreading and improving the teqc 'tips of week'
|> over the
|> past two years;
|> - David Maggert, Fran Boler, and all the other members of our GPS/GNSS archiving
|> team -- who
|> constantly suggested little extra needs or improvements, and did a huge amount
|> of examination
|> of real data at it poured into the UNAVCO archive through teqc, then found and
|> reported edge cases;
|> plus immense support from GNSS equipment manufacturers, engineers and others,
|> some of whom are:
|> - Trimble: Brian Frohring, Keith Trider, Tim Peterson;
|> - Septentrio: Jean-Marie Sleewaegen, Francesca Clemente, Thadeus Tuazon, David
|> Mertens, Jan Leyssens;
|> - Javad: Sergey Organov, Oleg Tulabin, Vladimir Yefriemov;
|> - Topcon: Dmitry Kolosov, Tom Morris, Alexei Zinoviev;
|> - Leica: Frank Pache, Neil Brown, Justin Walford, Youssef Tawk, Lienhart Troyer,
|> James Stowell;
|> - Navcom: Thadeus Tuazon, Kevin Dixon;
|> - Magellan: Dmitriy Ivanov;
|> - Ashtech: Robert Snow, Igor Artushkin, Dmitriy Ivanov, Dmitry Kozlov;
|> plus major community supporters:
|> - Jeff Freymueller, Mark Murray, Geoff Blewitt, Richard Langley, Jim Ray,
|> Giovanni Sella,
|> Nacho Romero, Neville Palmer, Ted Zhou, Kristine Larson, Dave Stowers, Angie
|> Moore,
|> Razmik Khachikyan, Bob King, Tom Herring, Carey Noll, David Sandwell, Markus
|> Ramatschi,
|> Markus Bradke, Oliver Montenbruck, Matt King, Hans van der Marel, Ambrogio Maria
|> Manzino,
|> Nobert Suard, Yuki Hatanaka, Hiromichi Tsuji, John Beavan, Herb Dragert, Michael
|> Schmidt,
|> and many, many others;
|> and a very special "thank you" to:
|> - Werner Gurtner, Univ. of Berne -- who was very patient with me early on when
|> I'd ask
|> questions or point out discrepancies in his mid-1990's RINEX documentation, and,
|> later on,
|> became a friend engaging in many technical, philosophical, and personal
|> discussions.
|> (We miss you, Werner.)
|> Anyone who has been on this list for awhile needs no reminding that you are part
|> of
|> a large world-wide group of teqc users (including a couple dozen engineers here
|> at UNAVCO)
|> with which to confer, plus there are the on-line teqc resources at
|> https://www.unavco.org/software/data-processing/teqc/teqc.html
|> and past emails at https://postal.unavco.org//pipermail/teqc/ which now includes
|> over 100
|> 'tips of the week'.  And just running `teqc +help` outputs the various command
|> line options.
|> A separate email from UNAVCO management will follow describing what the path
|> forward is going
|> to be.  (In the meantime you can execute `teqc +patton` for some humor and/or
|> inspiration --
|> an option which has been around since almost the beginning and has been
|> periodically updated;
|> it's in every version of teqc that you have and is perfectly safe: you just
|> execute teqc with
|> that one option ... or '-patton', whichever.)
|> Hopefully, I've at least demonstrated the art of the possible, including
|> wrangling (*) all
|> GPS/GNSS formats that came into the UNAVCO archive (covering data going back to
|> 1986) with
|> a single, unified command line interface, providing simple ways of examining
|> that data, and
|> making that same interface available on a wide variety of operating systems
|> (which included
|> both big-endian and little-endian processors -- for those of you who know what
|> that means).
|> You've also benefited from my being a physicist and geophysicist, having
|> actually done field
|> work (including geodetic field work: GPS ground and helicopter campaign work in
|> and around
|> Yellowstone, and even helping to install a few PBO permanent sites, including
|> P197; see
|> tip of week 2025, https://postal.unavco.org/pipermail/teqc/2018/002558.html),
|> being comfortable
|> with (and usually insisting upon) talking directly with engineers, and
|> essentially being
|> an interface that you could directly contact any time, any day, with questions
|> about teqc
|> and this whole complex GPS/GNSS technological rodeo -- for over two decades.
|> Here at the end, I thought perhaps a funny historical side note may be of
|> interest.  In the
|> fall of 1996 the first version of what was going to become known as 'teqc'
|> (which I coined
|> for 'translate, edit, quality check') was nearing a first limited release, a
|> name was yet to
|> be decided for it.  Up to that point I had been just referring to it internally
|> as 'rt' for
|> 'RINEX Tool' -- or, in my more cynical moments, as 'RINEX Analysis Tool' or
|> 'rat' -- but it
|> was increasingly clear that 'rt' didn't really capture what it was all about.
|> Given that
|> the core quality check algorithms in it had come from the earlier UNAVCO code
|> 'QC' (for
|> 'quality check'), which itself was quite well known in the early and mid-1990's,
|> and given
|> that Chuck had first hired me to replace 'QC' with a more stable and portable C
|> or C++ code
|> base, Chuck suggested naming it 'QCplus'.  However, as you all should know by
|> now, the default
|> behaviour with no options is to try to read some input and output RINEX, and in
|> order to do a
|> quality check on the input you need to use the '+qc' option.  After thinking
|> about this
|> suggestion for about two seconds, I told Chuck there was no way in hell I was
|> going to spend
|> years explaining to people that in order to do a quality check one would have to
|> execute
|> the command `QCplus +qc ...` -- so then I came up with the 'teqc' acronym.  (All
|> true.)
|> Well, partners, it's now time for me to saddle up and take off in search of new
|> adventures,
|> new challenges, and new horizons ...  Gotta ride.  Daylight's burning.
|> cheers,
|> --lou
|> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|> Louis H. Estey, Ph.D.                                 (retired)
|> "If the universe is the answer, what is the question?"
|>                                                 -- Leon Lederman
|> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|> * That's the North American western use of the word 'wrangle'.
|> _______________________________________________
|> teqc mailing list
|> teqc at postal.unavco.org
|> https://postal.unavco.org/mailman/listinfo/teqc
| --
| Mit freundlichen Grüßen, Uwe Hessels
| _________________________________________________
|   Dipl.Ing. Uwe Hessels
|   Bundesamt für Kartographie und Geodäsie
|   Geodätisches Observatorium Wettzell
|   Betriebsgruppe Mikrowellenverfahren VLBI-GNSS-DORIS
|   Sackenrieder Str. 25
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|   e-mail (office)  uwe.hessels at bkg.bund.de
|   e-mail (altern.) hessels at fs.wettzell.de
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