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#2651 2021-02-14 14:14:18

simple777
Member
From: Togliatti
Registered: 2020-12-17
Posts: 18

Re: RTKlib/постпроцессинг

... предварительно изготовив оправку для гнутья, на глаз не прокатит

Планирую сделать модель для 3Д принтера и распечатать, чтобы соблюсти размеры.

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#2652 2021-02-14 14:46:02

2002_ivan
Member
Registered: 2019-07-14
Posts: 178

Re: RTKlib/постпроцессинг

simple777 wrote:

... предварительно изготовив оправку для гнутья, на глаз не прокатит

Планирую сделать модель для 3Д принтера и распечатать, чтобы соблюсти размеры.

я тоже так планировал big_smile

Last edited by 2002_ivan (2021-02-15 07:30:30)

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#2653 2021-02-16 15:50:36

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

Is anyone here still using SiRF II or III receivers ? I found an old Globalsat BT-338 and have downgraded the firmware to 3.02 using http://gps.0xdc.ru/wiki/doku.php?id=sir … sat_bt-338 and normally this should output phase data but when I use the Kinematic2_MobileApp app by Cnav on geodesist.ru to produce a Rinex the phase data is empty and there are no readings in RTKPost. When I log with SiRFDemo there does seem to be info though. There is also an app called GNSS Monitor by sklimkim but I can't download the latest v4 version. Anyway I'm confused and would appreciate if anyone can help, thanks !

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#2654 2021-02-21 13:09:43

usm78-gis
Member
Registered: 2008-04-21
Posts: 2,648

Re: RTKlib/постпроцессинг

webvan wrote:

normally this should output phase data

Did you enable the sirf messages with the raw data content ?
The same should apply also to the antraris4 receivers.

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#2655 2021-02-21 13:56:39

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

Thanks for your suggestion.
For Antaris 4 I can use RTKNavi directly with the uBlox format so I can see quickly if the messages are enabled.
For SiRF receivers there is a SiRF format input for the Android version of RTKLibe but not for the computer version and I'm not getting any satellite info in the Android version so I'm not sure if it's expecting a different SiRF format (SiRF 4?) or if messages haven't been enabled properly...
It seems that with SiRFII or SiRFIII you can't do realtime and have to log data ?
When I look at the sirfstar.gps log from SiRFDemo the CarrierPhase data is there but not in Rinex log produced by theKinematic2_MobileApp app. I haven't found an app to convert the sirfstar.gps to Rinex.

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#2656 2021-02-23 21:29:56

usm78-gis
Member
Registered: 2008-04-21
Posts: 2,648

Re: RTKlib/постпроцессинг

webvan wrote:

It seems that with SiRFII or SiRFIII you can't do realtime and have to log data ?

sirf2, sirf3 and sirf4 use exactly the same raw binary data packet format (GPS, 12 channels).

When I look at the sirfstar.gps log from SiRFDemo the CarrierPhase data is there but not in Rinex log produced by theKinematic2_MobileApp app. I haven't found an app to convert the sirfstar.gps to Rinex.

Which messages did you enable with the SiRFDemo program ?

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#2657 2021-02-24 22:42:56

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

I have enabled several including the one with Carrier Phase data apparently : 028 (0x1C - Nav Lib Measurement Data) enabled and when I look at "Receiver Output View" in SiRFDemo I can see the data coming through. With the BT338 running 3.00 the carrier phase field in sirfstar.gps is 0.00000 but in 3.02 (got it here http://gps.0xdc.ru/wiki/doku.php?id=sir … at_bt-338) there are non 0 values.

I haven't been able to determine if there are real time solutions (RTKNavi for instance) for SiRF receivers or if it's logging only and then post-processing with a Rinex file. So far I have only found the Kinematic2_MobileApp app that is supposed to create a Rinex but that's not working for me for some reason, are there others ? Thanks !

Last edited by webvan (2021-02-24 23:09:22)

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#2658 2021-02-25 06:32:57

chnav
Member
From: Russia / Kazakhstan
Registered: 2010-03-18
Posts: 3,218

Re: RTKlib/постпроцессинг

webvan wrote:

I haven't been able to determine if there are real time solutions (RTKNavi for instance) for SiRF receivers or if it's logging only and then post-processing with a Rinex file. So far I have only found the Kinematic2_MobileApp app that is supposed to create a Rinex but that's not working for me for some reason, are there others ? Thanks !

What version of Kinematic2_MobileApp and what platform (Win32 or Windows Mobile) do you use ?
I haven't looked in sources for many years but if remember correctly the logging of carrier phase was not implemented in early versions (2011) due to phase measurements was not present in sirf binary data.

Last edited by chnav (2021-02-25 07:38:33)

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#2659 2021-02-25 10:10:26

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

Thank you for your help. I'm using version 0.11 on Win32 from https://geodesist.ru/threads/programma- … post-74909 - I haven't found more recent versions ?

The BT-338 log (test1131.11o) posted by sklimkim here https://geodesist.ru/threads/programma- … post-74904 has phase data in it using FW 3.1.1 with the same reference as the one found here http://gps.0xdc.ru/wiki/doku.php?id=sir … sat_bt-338 - I will flash mine to that version from 3.0.2 that it's using right now.

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#2660 2021-02-25 10:37:32

chnav
Member
From: Russia / Kazakhstan
Registered: 2010-03-18
Posts: 3,218

Re: RTKlib/постпроцессинг

webvan wrote:

Thank you for your help. I'm using version 0.11 on Win32 from https://geodesist.ru/threads/programma- … post-74909 - I haven't found more recent versions ?

kinematic-release-0.13

Program changes baudrate, protocol and messages automatically so no need to do it in SirfDemo. It is logging both RINEX and raw binary data which can be replayed in SirfDemo or converted in 3rd party tools.

Last edited by chnav (2021-02-25 12:19:44)

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#2661 2021-02-25 10:45:20

usm78-gis
Member
Registered: 2008-04-21
Posts: 2,648

Re: RTKlib/постпроцессинг

webvan wrote:

I have enabled several including the one with Carrier Phase data apparently : 028 (0x1C - Nav Lib Measurement Data) enabled and when I look at "Receiver Output View" in SiRFDemo I can see the data coming through.

One message is not enough for the generation of proper RINEX output, please enable MID7, MID8 and MID28.

I haven't been able to determine if there are real time solutions (RTKNavi for instance) for SiRF receivers or if it's logging only and then post-processing with a Rinex file.

I am not aware of any ready-to-use compiled rtklib version with the sirf raw data support,
but you can compile it yourself. It will be a tough exercise on windows neutral

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#2662 2021-02-25 14:19:21

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

What is strange is that RTKGPS+ for Android supports SiRF input and it is built from RTKLIB so I'm not sure why SiRF is not there. Unfortunately the support for SiRF in Alpha 26 (latest version on the Playstore) of RTKGPS+ for Android is broken, it is working in Alpha 23 but in that version I can't get data from Ntrip feeds...I wasn't able to find apks of Alpha 24 or Alpha 25 to see if one of them has both SiRF and Ntrip working properly. Does anyone here have them maybe ?

chnav wrote:
webvan wrote:

Thank you for your help. I'm using version 0.11 on Win32 from https://geodesist.ru/threads/programma- … post-74909 - I haven't found more recent versions ?

kinematic-release-0.13

Program changes baudrate, protocol and messages automatically so no need to do it in SirfDemo. It is logging both RINEX and raw binary data which can be replayed in SirfDemo or converted in 3rd party tools.

Thank you very much ! I now get Carrier Phase data in the Rinex. I will try to post-process it with RTKPost to see if I get usable results.

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#2663 2021-02-26 07:33:48

2002_ivan
Member
Registered: 2019-07-14
Posts: 178

Re: RTKlib/постпроцессинг

webvan wrote:

I now get Carrier Phase data in the Rinex. I will try to post-process it with RTKPost to see if I get usable results.

in single mode RTKPost  not use Carrier Phase & Doppler

Last edited by 2002_ivan (2021-02-26 08:21:41)

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#2664 2021-02-26 10:02:28

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

Why not use the static/kinematic mode ? Here is the brief test I did yesterday for a few minutes, will do another one today. Not sure why Single is so bad, NMEA output would be a lot better.

SiRFstar III BT-338 2' static test :
single-vs-static.png

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#2665 2021-02-26 10:44:22

chnav
Member
From: Russia / Kazakhstan
Registered: 2010-03-18
Posts: 3,218

Re: RTKlib/постпроцессинг

webvan wrote:

Why not use the static/kinematic mode ? Here is the brief test I did yesterday for a few minutes, will do another one today. Not sure why Single is so bad, NMEA output would be a lot better.

SiRFstar III BT-338 2' static test :

1. After Hot/Cold reset wait approx 30-45 seconds  to start-up receiver and then start logging RINEX. Otherwise first 30 seconds of data contain wrong time marks (non-synchronized). You can see it as decimals in seconds.
2. "Window tests" give bad results, must be good satellite view.

Last edited by chnav (2021-02-26 10:49:36)

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#2666 2021-02-26 11:08:59

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

Thanks, I will try again.

Does anyone have APKs of Alpha 24 or Alpha 25 of RTKGPS+ Android to see if they still support SiRF input unlike the current Alpha 26 ?

Last edited by webvan (2021-02-26 11:16:45)

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#2667 2021-02-27 19:52:20

usm78-gis
Member
Registered: 2008-04-21
Posts: 2,648

Re: RTKlib/постпроцессинг

webvan wrote:

Does anyone have APKs of Alpha 24 or Alpha 25 of RTKGPS+ Android to see if they still support SiRF input unlike the current Alpha 26 ?

I have compiled the current github tree with minor changes for armv8 target using gradle
and standard Linux toolchain, using a custom rtklib version with F9P (and M9N) support (not the latest one from ttakasu).
If alpha26 works for you, then it should be possible to compile an .apk with sirf support.

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#2668 2021-02-27 21:25:20

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

That would be great ! I wonder what happened since "Alpha 23" that could have broken SiRF support...

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#2669 2021-03-04 22:55:05

webvan
Member
Registered: 2020-05-22
Posts: 13

Re: RTKlib/постпроцессинг

Good news, even though RTKGPS+ Alpha 20 that is compatible with SiRF does not read live data coming from the base station it can still log raw data for my BT-338 and then I can use chnav's "SiRF Converter" to convert the raw log to a rinex.

Hopefully Alpha 26 can be made compatible again with SiRF receivers for RTK-Float and Fix live solutions ;-)

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#2670 2021-03-16 06:57:37

RandoMan
Member
Registered: 2021-03-12
Posts: 5

Re: RTKlib/постпроцессинг

Товарищи, нужен совет. Есть задача: получить точность в пределах 1.5м в условиях почти чистого поля. Точность нужна в динамике, из салона автомобиля (лобовое стекло), почти в реальном времени (допустимы задержки в решении на несколько секунд).  На руках есть m9n, gn801(8030-kt) и китайские же m8n. m9n хоть и хорош, но всё же дороговат на старте проекта, да и сырые данные из него не достать на перспективу (в перспективе всё же хотелось бы rtk). rtklib с Модули gn801 и m8n с активной антенной (вероятно, хреновой) не дают желаемого результата, в лучшем случае float, но нестабильно.
Да, звучит как "всё сразу и дёшево", но таковы условия старта проекта, что каждая тысяча на один модуль ложится ощутимой суммой, поэтому пытаюсь найти самое оптимальное решение.
Если кто-то может предложить, на каком железе лучше стартовать (модуль и антенна), буду безмерно благодарен!

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#2671 2021-03-16 07:52:31

freeExec
Moderator
From: Ульяновск,Модератор всех слоёв
Registered: 2012-07-31
Posts: 8,310

Re: RTKlib/постпроцессинг

Очень странно, в чистом поле относительно базы на краю поля m8n полтора метра должен выдавать спокойно и без колебаний.

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#2672 2021-03-16 10:35:30

RandoMan
Member
Registered: 2021-03-12
Posts: 5

Re: RTKlib/постпроцессинг

freeExec wrote:

Очень странно, в чистом поле относительно базы на краю поля m8n полтора метра должен выдавать спокойно и без колебаний.

Именно rtklib прям в поле пока не удавалось проверить, нашёл лишь максимально чистое небо в городе на большой парковке. Понимаю, что переотражения и вот это вот всё, вероятно, имели место, и обязательно выеду в поле на днях. Но пока это не выглядит как надёжное решение. Даже single решение периодически пропадает. Может быть кто-нибудь может посоветовать проверенный модуль и толковую, чувствительную антенну?

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#2673 2021-03-16 13:39:27

chnav
Member
From: Russia / Kazakhstan
Registered: 2010-03-18
Posts: 3,218

Re: RTKlib/постпроцессинг

RandoMan wrote:

Даже single решение периодически пропадает.

Вот с этого и надо начинать, учитывая что антенна на лобовом стекле. Полнебосвода закрыто, какой тут RTK...

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#2674 2021-03-16 13:41:44

RandoMan
Member
Registered: 2021-03-12
Posts: 5

Re: RTKlib/постпроцессинг

chnav wrote:
RandoMan wrote:

Даже single решение периодически пропадает.

Вот с этого и надо начинать, учитывая что антенна на лобовом стекле. Полнебосвода закрыто, какой тут RTK...

Начинать, что именно? С того, что ничего не получится, или с другой антенны?

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#2675 2021-03-16 15:19:31

Cтрелок
Member
Registered: 2020-07-18
Posts: 31

Re: RTKlib/постпроцессинг

RandoMan wrote:

Начинать, что именно? С того, что ничего не получится, или с другой антенны?

Наверное, chnav хотел сказать, что установка антенны на крыше автомобиля улучшило бы ситуацию.

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