A Helical 1.2m off the ground on the tractors nose only loses fix once while cutting in these trees, there are also comparable trees behind the camera, Its a really great design.
I agree with @torriem the most important antenna is the base and it must see as clear a sky as possible. If you can get it up on top of a building all the better.
Hello,
Thanks for the advices.
With “poor results” I mean :
On www.rtk2go.com, mine is FRA_62160; on caster.centipede.fr, the nearest is ARRAS (Drotek DA910), all with F9P
if I compare both :
My antenna is located at the highest point of the house (chimney) with a 80 * 60 cm zinc ground plane.
The sky at 15/20 ° is fully open.
Installation is : F9P connected to Raspberry PI0W (str2str) connected by wifi to internet box (ADSL)
I’ve tried to connect the ground plane to earth of electric installation → no effect
Put a ferrite on the USB connected to F9P → no effect
This is the reason why I suspect the antenna and wonder if with a better antenna, reception levels could be better ? I suspect also that there could be reflexions (on the roof) ?
Francois
Pour la base L’antenne Ardusimple Survey a 89 euros est parfaite
pour le rover la ublox ANN-MB fait tres biens l’affaire ne négligez pas non plus le cable d’antenne celui-ci peut être la cause d’une mauvaise réception
vous ne renvoyez pas non plus les même messages
STR;ARRAS;Saint-Laurent-Blangy;RTCM 3.3; 1004(1),1005(10),1008(10),1012(1),1019(3),1020(2),1033(10),1042(3),1046(3),1077(1),1087(1),1097(1),1107(1),1127(1),1230(30);2;GLO+GAL+SBS+BDS+GPS;NONE;FRA;50.29;2.79;0;0;sNTRIP;none;N;N;11680;CENTIPEDE
STR;FRA_62160;;RTCM 3.2; 1087,1097,1127,1230;;GLO+GAL+BDS;SNIP;XXX;50.45;2.74;1;0;sNTRIP;none;B;N;0;none;
Je pense qu’il vous manque au moins 1004,1005,1008,1077
My first suspicion would be signal loss due to long cabling.
Next i would check if the antenna impedance is in spec for the f9p, and voltage range for active antenna power.
Hello and thank you for your help,
@torriem
I’ve double checked and my antenna (Taoglas AQHA,50,A,301111) sound compatible with f9p
@TERVUREN
In f9p configuration, I can not activate 1004 and 1008 etc …
Only possible is 1005 (30) 1077 1087 1097 1127 and 1230 (30)
My Ntrip data are available on :
www.rtk2go.com FRA_62160
caster.centipede.fr GRENAY
I’ll try to do these test otherwise find an Ardusimple survey
Best regards,
Francois
j’ai remarqué que GRENAY etait uniquement L1 peut-être une mauvaise verion de str2str .
Vous renvoyer le signal rtcm de la f9p en passant str2str vers centipede et rtk2go alors que vous pouvez paramétrer str2str -in Format ubx et vous pouriez alors y mettres les messages que vous souhaitez une autre solution serais de connecter votre f9p a un Pi3 et d’y installer Rtkbase RTKBase: a GUI for your own Gnss Base Station Fabriquer une base RTK - Centipede RTK
Hello,
@TERVURREN
GRENAY sur centipede n’est indiqué qu’en L1 car je n’avais que des M8T et l’administrateur avait indiqué cela dans les libellés. A présent avec le f9p je suis bien en L1 + L2 mais je n’ai pas encore effectué d’enregistrement long avec positionnement précis et mise à jour sur le site.
Merci pour vos conseils, je vais essayer de configurer le f9p en ubx rxm rawx et sfrbx et effectuer la conversion en rtcm3 avec str2str
Hello,
I’ve bought the Ardusimple Survey antenna, received yesterday.
At first quick tests, it is far much powerfull than my Taoglas one.
Reception level with f9p is far better (at least 5 to 8 dB)
I’ll install it better, do I have to put a ground plane below this antenna or could I install it without ?
Best regards
francois
for the Ardusimple Survey antenna The ground plane is unnecessary
Hello, I see a new antenna in AliExpress, Store Topgnss ANT105 L (about 66 dollars)
It could be a good option for use as rover or base?
Its multi frecuence l1 l2 l5 and 40db gain
Some one have cheked?
I think thats its à cheper option for use with f9p ardusimple
Thanks
Hi
With Aliexpress double check that this Is Not à beitian rebranded
François
Yes its simillar of other antennas, but if its good Quality … it could bé usefull for ours systems.
I dont know if its best than ublox basic antenna with à ground plane, for a rover use in my tractor
It looks good to me. I already have a couple of the Beitian antennas that work well. When I need another antenna I will order one of these to try.
I have a free public ntrip base about 25 km from my fields i need one if this antennas or its good thé ublox included un the starter kit?
With the public antenna it is enough, in Spain we have the service for free.
Somos pocos pero vamos creciendo 
Hello.
He tests the F9P set with the ANN-MB antenna in tractors and combines with quite satisfactory results. However, I have a fairly frequent problem in several fields, with the message “Lost RTK” and switching to “Float”, which causes inaccurate guidance. Will replacing the antenna with another help? If so, which one? Beitian BT160 or BT 200 will be good?
First make sure that the issues are not losing corrections, make sure that the corrections are coming in every second. If the corrections are coming in more than 2s apart something is not optimized in the communication link.
Under open sky any antenna will do. Make sure that the antenna is free of dust periodically.
The antenna is 100% clear. Corrections is this “Age” value? there I always have 1.0 to 1.5, unless I lose my internet connection, but that rarely happens, only then I know when it is happening. On the other hand, the case that I describe happens each time in the same fields, in the same places and in the same direction of movement. For example, in one field it is an area 30m wide and only when I move eastwards, but when I go westwards, the RTK returns.
Where do you get your correction signal from? Do you have all 4 constellations in use? If you have your own base, does the base have good sky view too? How about trees etc. in the field, good sky view in all directions?
I get the correction signal from the base station, 34 km from my field. My problem areas are completely exposed. This station has GPS + GLO + BDS constellations. The next closest is 70km and has GPS + GLO + GAL + BDS.
