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ZL3AI > APRDIG 26.02.04 18:07l 804 Lines 13653 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Feb 24, 3/6
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Uncompressed vs Compressed formats
From: Earl Needham <needhame1@yucca.net>
Date: Tue, 24 Feb 2004 18:02:52 -0700
X-Message-Number: 20
At 04:44 PM 2/24/2004, Christensen, Eric wrote:
>I wouldn't judge anything in APRS by limitations in WinAPRS.
Quite a crack, that.
Seriously, are any statistics available showing what percentage of APRS
users use WinAPRS vs. APRS+ vs. UI-View32 vs...? If available, I'd sure
like to see it.
Thanks all,
Earl
Earl Needham, KD5XB, Clovis, New Mexico DM84jk
KD5XB-2>APW251,PCSAT-1%:=3425.83N/10313.55W-PHG7150/WinAPRS 2.5.1
-EARL_CLOVIS -251-<630>
SETI@Home: 11385WU/7.39yrs
----------------------------------------------------------------------
Subject: Re: Uncompressed vs Compressed formats
From: "Christensen, Eric" <CHRISTENSENE@MAIL.ECU.EDU>
Date: Tue, 24 Feb 2004 20:53:34 -0500
X-Message-Number: 21
Sorry about that... That is so unlike me, too! :)
Anyway, I really wanted to do just that so I could find out what percentage
of users use what. Yahoogroups has a polling feature, but that won't really
work here.
I tell you what, let me figure out an easier way to do it and I'll do the
survey.
73s,
Eric KF4OTN
kf4otn@arrl.net
kf4otn@w4ral.#rtp.nc.usa.noam
ARRL Member
AMSAT Member: 35360
TAPR Member: 8869
Support your Hobby! Join a club.
All contact logs are uploaded to the ARRL LoTW and eQSL.
----------------------------------------------------------------------
Subject: APRS Client Survey
From: "Christensen, Eric" <CHRISTENSENE@MAIL.ECU.EDU>
Date: Tue, 24 Feb 2004 21:10:04 -0500
X-Message-Number: 22
Attention all APRS Users. By popular demand, I am conducting a survey.
Please send a new email to christensene@mail.ecu.edu with [APRS SURVEY] as
the subject line.
In the message, include the client software that you are using.
Like this...
UIView
Xastir
DOSAPRS
I will run this survey for one week or until the messages stop. Once I have
all this data, I'll figure out how to get all the numbers (I think I have an
easy way) and will post the data to the SIGs and to the internet. Duplicate
emails will be filtered out and deleted. Any email that has any extra stuff
in it will also be deleted. If you don't have [APRS SURVEY] in the subject
line, the email will not be counted.
Thank you for your participation.
73s,
Eric KF4OTN
kf4otn@arrl.net
kf4otn@w4ral.#rtp.nc.usa.noam
ARRL Member
AMSAT Member: 35360
TAPR Member: 8869
Support your Hobby! Join a club.
All contact logs are uploaded to the ARRL LoTW and eQSL.
----------------------------------------------------------------------
Subject: RE: APRS Client Survey
From: "Rich Garcia" <k4gps@bellsouth.net>
Date: Tue, 24 Feb 2004 21:17:18 -0500
X-Message-Number: 23
Someone just did this about 1 or 2 months ago on the list... Never
remembered seeing the results though...
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Subject: FW: APRS Client Survey
From: "Christensen, Eric" <CHRISTENSENE@MAIL.ECU.EDU>
Date: Tue, 24 Feb 2004 21:24:28 -0500
X-Message-Number: 24
I guarantee that you WILL see the results of this one... Hey, this could be
considered extra credit for my Business Statistics class... Hmmm... :)
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Subject: Re: Uncompressed vs Compressed formats
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Tue, 24 Feb 2004 21:21:28 -0500
X-Message-Number: 25
>>>Jeff King <jeff@aerodata.net> 2/24/04 7:18:38 PM >>>
>The problem with the APRS compressed format, is it is Base 91,
>and it is a real pig to code up on a microcontroller. Ask Steve Bragg
>of the HamHud group why he doesn't support the APRS
>compressed format. He already tried, and it blew his
>code space budget.
Then I think he missunderstood it.
What many people overlook is that the BASE 91 conversion was designed with
multipler constants that kept the result to SINGLE PRECISION if they
*ignore* the LSB. Ignoring the LSB was *intended* for Microcontrollers.
This still gives them the *same* precison as already exists in the APRS
protocol (about 80 feet). The only reason to use the LSB in the XXXxYYYy
(the little "x" and "y" bytes is if the PIC wants to transmit precision to
1 foot.
I doubt any PIC controller needs that accuracy.
Again, the Base91 format and coeficients multipleiers were chosen so that
only the XXX_YYY_ part of the format needed to be decoded with single
precision intigers to yield the same precision as already exists in APRS.
This can be done by simply subtracting a constant, and then multiplying by
a constant (shift and add). Only the LSB is needed if precision down to
one foot is required. Even then it can still be done in single precision
and just added to the result.
de WB4APR, Bob
That should take 1 line of assembler
----------------------------------------------------------------------
Subject: RE: APRS Client Survey
From: "Christensen, Eric" <CHRISTENSENE@MAIL.ECU.EDU>
Date: Tue, 24 Feb 2004 21:31:13 -0500
X-Message-Number: 26
I should mention that I sent this out to the APRSSIG, the UI-View Listserv,
and the HF-APRS listserv. If you know of any others, please forward this
message on to them so we can get as many participants as possible!
73s,
Eric KF4OTN
kf4otn@arrl.net
kf4otn@w4ral.#rtp.nc.usa.noam
ARRL Member
AMSAT Member: 35360
TAPR Member: 8869
Support your Hobby! Join a club.
All contact logs are uploaded to the ARRL LoTW and eQSL.
----------------------------------------------------------------------
Subject: Re: APRS Client Survey
From: James Jefferson <jj@aprsworld.net>
Date: Tue, 24 Feb 2004 20:47:36 -0600
X-Message-Number: 27
Byon N6BG and I did a little experiment on this at DCC. By datamining that
aprsworld database we were able to generate statistics on what sort of
stations were on the air.
If somebody we to just look at the destination address you could probably
determine software and versions for most non MIC-E applications.
And for fun I've made such a list. It has destination address and number of
stations that used that destination address last time they transmitted.
http://db.aprsworld.net/tmp/destinations.out
The SQL query used for this is:
select raw.destination,count(lastposition.packet_id) from lastposition, raw
where raw.packet_id=lastposition.packet_id AND raw.destination like 'AP%'
GROUP BY destination;
I'm sure somebody can load it into a spreadsheet and make some pretty
statistics.
-Jim
----------------------------------------------------------------------
Subject: Re: APRS Client Survey (this has lots of lines!)
From: Earl Needham <needhame1@yucca.net>
Date: Tue, 24 Feb 2004 20:05:37 -0700
X-Message-Number: 28
At 07:47 PM 2/24/2004, James Jefferson wrote:
>Byon N6BG and I did a little experiment on this at DCC. By datamining that
>aprsworld database we were able to generate statistics on what sort of
>stations were on the air.
>
>If somebody we to just look at the destination address you could probably
>determine software and versions for most non MIC-E applications.
>
>And for fun I've made such a list. It has destination address and number of
>stations that used that destination address last time they transmitted.
>
>http://db.aprsworld.net/tmp/destinations.out
That didn't take too long!
However, the destination address of APRS is the most common, and, AFAIK, is
used by ALL software at some point. Or maybe none. At least, I can't
recognize what software defaults to the address of APRS.
APRS 3271
APU25H 2102
APU16N 954
APW251 529
APU25E 368
APT310 353
APU25J 346
APW272 307
APS221 268
APD214 233
APZ186 204
APW261 191
APU25D 179
APNU19 178
APU256 173
APD215 154
APX121 144
APW246 141
APT202 139
APU250 128
APU16K 116
APND0X 108
APZ18 81
APX120 68
APU16M 66
APS215 65
APU24P 63
APD225 56
APU24N 54
APC102 51
APNU18 51
APND0W 50
APK101 47
APU24V 45
APU25C 45
APR852 44
APW247 44
APZ17 43
APTW01 41
APU254 39
APRX46 36
APP194 34
APWUI 33
APEWX 32
APND0U 32
APRSW 32
APR848 31
APW249 30
APD213 29
APW250 27
APU24L 26
APSAAR 25
APK001 23
APATIS 19
APW245 18
APS199 17
APD223 16
APFD57 16
APN382 16
APND0V 16
APR846 16
APW228 16
APK002 15
APS212 15
APU24D 15
APZ036 15
APR851 14
APW248 14
APS214 13
APS222 13
APZ115 13
APZ182 13
APM361 12
APW227 12
APE011 11
APP190 11
APRSM 11
APWXTV 11
APX114 11
APZ188 11
APM372 10
APN383 10
APRSHH 10
APW243 10
APW244 10
APX113 10
APZ185 10
APFD74 9
APMICE 9
APRLX 9
APRSWX 9
APS206 9
APU24A 9
APZ022 9
APZ13 9
APBELU 8
APFD54 8
APM352 8
APND0R 8
APRS58 8
APU16J 8
APU24U 8
APZ18A 8
APZWPP 8
AP0922 7
APRHH2 7
APRSMD 7
APRSOE 7
APS201 7
APU24O 7
APUWX 7
APX115 7
APZMYK 7
AP25H 6
APFD09 6
APRS09 6
APW226 6
APW233 6
APX100 6
APX110 6
APZ184 6
AP 5
APAF28 5
APFD51 5
APND0P 5
APR842 5
APR861 5
APRB03 5
APRS19 5
APS 5
APS211 5
APU24B 5
APU25A 5
APX112 5
APZ023 5
APDEXP 4
APDRE 4
APEWX0 4
APFD55 4
APGL 4
APM325 4
APM345 4
APP120 4
APRS16 4
APRS21 4
APRS81 4
APTPNT 4
APW271 4
APX130 4
APX131 4
APZ001 4
APZ181 4
APZ19 4
AP272 3
APAH23 3
APE001 3
APFD31 3
APFWD 3
APHLJ 3
APN82 3
APNRW 3
APR 3
APR810 3
APR814 3
APR817 3
APR825 3
APR844 3
APRDA1 3
APRP 3
APRS-5 3
APRS37 3
APRS66 3
APRS74 3
APRSVA 3
APRSWW 3
APRX44 3
APS21 3
APT301 3
APT311 3
APTEST 3
APU24J 3
APU24M 3
APU5H 3
APW010 3
APWX 3
APZ123 3
APZ16 3
APZ183 3
APZ187 3
APZ18B 3
APZEMD 3
APZHOG 3
APZKAN 3
AP0 2
AP5H 2
APAF27 2
APAZH 2
APENE 2
APFD17 2
APFD88 2
APFLX 2
APFRL 2
APJEY 2
APK231 2
APM326 2
APM327 2
APM340 2
APM342 2
APM344 2
APN123 2
APND0S 2
APND0Y 2
APNEP 2
APNMFJ 2
APPM01 2
APQS 2
APR824 2
APR830 2
APR840 2
APR845 2
APR860 2
APRC 2
APRCAT 2
APRK 2
APRLP 2
APRS-1 2
APRS-8 2
APRS.R-7 2
APRS28 2
APRS42 2
APRS82 2
APRSAT 2
APRSBW 2
APRSIO 2
APRSP 2
APRSPC 2
APRSR 2
APRSV 2
APRX63 2
APS207 2
APS220 2
APSCY 2
APSG99 2
APTS 2
APU186 2
APU18A 2
APU24H 2
APU24K 2
APU25H-10 2
APU34N 2
APU36Q 2
APUI18 2
APW240 2
APW241 2
APW242 2
APW273 2
APZ031 2
APZ10 2
APZ100 2
APZ103 2
APZAVR 2
AP00 1
AP18 1
AP1F 1
AP21 1
AP246 1
AP261 1
AP32 1
AP340 1
AP3710 1
AP4BHA 1
AP51 1
AP52 1
AP5251 1
AP525H 1
AP72 1
AP7GR 1
APABY 1
APAF26 1
APALE 1
APALO 1
APANZ 1
APAPD 1
APAPP 1
APAX17 1
APAYB 1
APBB 1
APBDM 1
APBEN 1
APBHA 1
APBRL 1
APBS 1
APBSC 1
APBW 1
APC099 1
APC221 1
APCBM 1
APCCK 1
APCPA 1
APCPN 1
APCUP 1
APD0X 1
APD221 1
APD226 1
APD251 1
APD25H 1
APDD0W 1
APDFF 1
APDFL 1
APDIGI 1
APDKS 1
APDLP 1
APDS 1
APDTN 1
APDW 1
APE01 1
APE16N 1
APEGU 1
APES 1
APF800 1
APF890 1
APFAJ 1
APFD02 1
APFD08 1
APFD51-5 1
APFD57-3 1
APFD60 1
APFD77 1
APFD78 1
APFD95 1
APFJJ 1
APFLS 1
APG 1
APG251 1
APGAE 1
APGBW 1
APGEO 1
APGJL 1
APGMOT 1
APHH2 1
APHIT 1
APHJG 1
APHWB 1
APIAZ 1
APin 1
APJ3 1
APJAN 1
APJFM 1
APJJX 1
APJRA 1
APJS 1
APK 1
APK1 1
APK201 1
APK500 1
APK821 1
APKAM 1
APKD700 1
APLAW 1
APLD0U 1
APLEA 1
APLKE 1
APM100 1
APm32 1
APM350 1
APM371 1
APM374 1
APMc40-4 1
APMUS 1
APN050 1
APN3 1
APN390 1
APN83 1
APND03 1
APNDOU 1
APNDOW 1
APNDS 1
APNK 1
APNLNX 1
APNLS 1
APNORW 1
APNRR 1
APNSMW 1
APNT0U 1
APNU19-6 1
APNU1w-15 1
APNU86 1
APNWI 1
APNY 1
APO251 1
APODW 1
APOJ56 1
APOOL 1
APOT01 1
APP112 1
APP114 1
APP116 1
APP195 1
APPDE 1
APPOH 1
APPSLV 1
APPYL 1
APQ261 1
1-Apr 1
APR815 1
APR819 1
APR832 1
APR83P 1
APR841 1
Apr-85 1
APR863 1
APRB01 1
APRBZ 1
APRD68 1
APRDB0 1
APRDQ 1
APRE 1
APRFBB 1
APRGVG 1
APRHE 1
APRHRL 1
APRLM 1
APRM?T-6 1
APRP@ 1
APRPL 1
APRPSLV 1
APRQRL 1
APRRBH 1
APRRS 1
APRS-13 1
APRS-2 1
APRS-7 1
APRS.D-1 1
APRS01 1
APRS04 1
APRS12 1
APRS14579 1
APRS15 1
APRS18 1
APRS24 1
APRS31 1
APRS40 1
APRS65 1
APRS68 1
APRS7-3 1
APRS76 1
APRS85 1
APRS88 1
APRSB 1
APRSBH 1
APRSCH 1
APRSEU 1
APRSF 1
APRSG 1
APRSHT 1
APRSI 1
APRSMH 1
APRSNC 1
APRSOB 1
APRSPOINT 1
APRSPR 1
APRSPT 1
APRSRP 1
APRSTX 1
APRSW-1 1
APRSW-3 1
APRSW-4 1
APRSY 1
APRU 1
APRVKB 1
APRWB 1
APRWX 1
APRX39 1
APRX41 1
APRX45 1
APRY 1
APS-21 1
APS001 1
APS01 1
APS021 1
APS1 1
APS200 1
APS210 1
APS2RQ 1
APSA 1
APScm1 1
APSCW 1
APSD57 1
APSDi1 1
APSE1 1
APSF1 1
APSR 1
APT339 1
APT3c0 1
APT852 1
APTGC 1
APTHO 1
APTHR 1
APti5H 1
APTLP 1
APTM 1
APTS00 1
APTT25 1
APTTA1 1
APU 1
APU02 1
APU17J 1
APU2-H 1
APU24 1
APU24E 1
APU24S 1
APU25G 1
APU25H-2 1
APU25P 1
APU25R 1
APU26E 1
APUA5H 1
APUD5H 1
APUH 1
APUIW 1
APV06 1
APV25q-2 1
APW161 1
APW21 1
APW246-6 1
APW252 1
APW260 1
APW270 1
APW272-12 1
APW274 1
APW2V1 1
APW532 1
APW61 1
APWBS 1
APWS 1
APWX10 1
APX111 1
APXD 1
APXEXO 1
APXXX 1
APY1 1
APYSM 1
APZ000 1
APZ007 1
APZ01 1
APZ016 1
APZ017 1
APZ018 1
APZ033 1
APZ173 1
APZ180 1
APZ191 1
APZ242 1
APZ281 1
APZ48 1
APZ81 1
APZDEA 1
APZEMM 1
APZGCP 1
APZM 1
APZQ86 1
APZU19 1
AP^121 1
AP_LT 1
Earl Needham, KD5XB, Clovis, New Mexico DM84jk
KD5XB-2>APW251,PCSAT-1%:=3425.83N/10313.55W-PHG7150/WinAPRS 2.5.1
-EARL_CLOVIS -251-<630>
SETI@Home: 11385WU/7.39yrs
----------------------------------------------------------------------
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