Архив за 19.09.2017

NOAA apt — V-dipole reception

Hi guys,

i built Adam9A4QVs V-dipole antenna and tried to receive some NOAA-images.

From the first satellite pass i only got the last part, when the satellite was on low elevations. Nevertheless the signal was very audible and there was not much noise.
The second pass i got from beginning to end. On low elevations the signal was very good, but it got worse on higher elevations and better when the satellite approached the horizon again at the end.

When loaded into wxtoimg it went as expected. The end of the first pass decoded to a nice clear image while on the second satellite pass the beginning and end was clear while the middle part was full of noise.

Thats not what i was expecting from this kind of antenna, because most NOAA-images received by it i saw on this subreddit were more of the opposite - noisy on low elevations and clear on higher elevations.
What could be the cause of this? Do you think its from my antenna-build-quality or maybe because of wrong settings while recording?

Also in wxtoimg i didnt get the map-overlay to work. When autodecoding the image an overlay got produced but its not correct. I tried shifting it but this also didnt really work. The overlay was cut off at some point.
I already updated the kepler data and checked the file-naming and ground-station-position.
I saw that a wrong NOAA-satellite got auto-detected. But when setting the right satellite manually the image got decoded but there was no map overlay at all, just a warning that no map overlay file could be found.
Anyone knows about this problem and got a solution?

Greeting and thanks :-)

P.S. will post images of the antenna and received NOAA-images if i get it to work :-)

submitted by /u/ecocapi
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Hurricane Norma Hitting Baja From Meteor M2

Hurricane Norma Hitting Baja From Meteor M2 submitted by /u/jwoft
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Comment on PantronX Titus II Ready for Production by Drone

Excerpting from the 01 Nov. 2016 post here”

http://radioaficion.com/cms/titus-ii-sdr-receiver/

“Looking much like a 1990s’ boom-box — except that the central section is entirely occupied by a touchscreen Android tablet — the Titus II’s software-controlled capabilities, ability to receive new transmission formats through software upgrades, and the receiver’s proposed under-US$100 (approx. €90) price tag had HFCC delegates utterly wowed.”

Under-US$100?… Really?

I can’t find any newer price updates, at least not without digging through the multiple layers of script-bloated web pages at the manufacturer’s site (I gave up).

Maybe the business model is to hook you with a “low” entry price for what is essentially a software-crippled device, then nickel and dime you to death with “upgrades” and ever-lasting “cloud-controlled” recurring license and support fees.

RTL-SDR Discussion • Re: Python SDR Libraries

Sinced no one answered, pyrtlsdr

Statistics: Posted by tomdean — Tue Sep 19, 2017 6:30 pm


Comment on New Linux RTL-SDR Driver with Fully Exposed Controls by Anonymous

Thx for sharing

Comment on New Linux RTL-SDR Driver with Fully Exposed Controls by Anonymous

Awesome!!.
Thx for sharing the project.
regards
N=Gattu

lte-cell-scanner CellSearch RXPWR a LTE RSRQ measurement?

lte-cell-scanner CellSearch RXPWR a LTE RSRQ measurement? submitted by /u/dr_strangemind
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daomsk А sdr хотел пощупать чисто из спортивного интереса. Уже не хочу… Вам нужно послушать сдр-приемники получше и у …

Zmej пишет:
daomsk А sdr хотел пощупать чисто из спортивного интереса. Уже не хочу... Вам нужно послушать сдр-приемники получше и у кого-то на нормальных антеннах, т.к. сейчас сложилось неправильное представлени...
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Широкополосный приёмник из DVB донгла - Страница #521

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если при отключении света пропадают, значит местное, а если нет возможно и переполнение и перегруз в увч. Вы фильтр спая…

ivanovgoga пишет:
если при отключении света пропадают, значит местное, а если нет возможно и переполнение и перегруз в увч. Вы фильтр спаяйте-делов то 5 минут. Кстати в HDSDR показывает уровень заполнения(переполнения...
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Широкополосный приёмник из DVB донгла - Страница #521

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ivanovgoga я про переполнение АЦП, а так же перегруз в УВЧ(интермоды, забитие…) Все это видно в виде частокола. У меня…

Ruiz_Av пишет:
ivanovgoga я про переполнение АЦП, а так же перегруз в УВЧ(интермоды, забитие...) Все это видно в виде частокола. У меня на 144, переполнение ацп, или перегруз увч? Просто так, что бы знать. :)
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Широкополосный приёмник из DVB донгла - Страница #521

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