Hi Folks
Sorry for my English 
I need your help on a project that im currently working on.
I am building a high powered model rocket's avionics system. In the system its required to transmit sensor datas and live video.
I used to use Xbee module to transmit only sensor data in about 3 to 4 kilometers.(it was pretty hard)
Now i am thinking about switching to the LoRa module and transmitting live video footage in a range of approximately 10 kilometers(20k feet). My question is which LoRa module should i choose. And also which camera would be the greatest deal.
Note : In the rocket we are using Teensy 4.1, but i dont think it'll cause any problem that we won't face with arduino uno.
Note : The transmission(rockets launch) will take place at a non-urban , out-of-town, clear sight area.
I appreciate any kind of help.Thx a lottt.
My understanding of LoRa is that the data rate is severely limited and there is no way you an send video through it.
Not a chance with LoRa, data rate is very low, probably even lower than Xbee. I believe that drones use Wi-Fi for video transmission as the data rate is easy but range could be limited unless you use a directional antenna at your "ground station" and track the vehicle. Pringles cans reputably make good helical antennas (Google it). Only other possibility may be to fit an LTE cellular module but very expensive and probably using it outside its licence.
Thx for the replies. What about image transmission.How much image can i get in a second (or any given time , frequency vise ). We decided to use lora sx1278.
And also we are using yagi antenna in the ground station
Why must the video be live? Can't you just record and recover it?
You have to do it separately, or at least a reasonable attempt should do it separately. Sensor data is nice and simple compared to video transmission (obviously). Is it possible to have a repeater in the Xbee data transmitter or is your 10km strictly above ground level? If you have access to a drone and fly at 400 feet (or whatever you're legally allowed in your area) could you mount an Xbee configured as a repeater to the drone?
As for vtx, you're into the realm of these things, lots of things affect the success users report having although you seem to have accounted for a lot of these so maybe it would work for you? What resolution are you hoping to transmit?
Requirements of the competition.Its not up to me.
Can you post the part about video? It would help narrow things down.
Launch will take place at 1km above sea level.Then the rocket will reach 6km from its initial position.We assume that there will be max 7km distance between us. And its a clear sight.Repeater is impossible.(out of rules)
About resolution there is no info given by the competition.It could be 1080 480 360,i guess it doesnt matter.But if its possible, my choice would be 1080p
They state that:
Its required to transmit instantaneous image from main rocket avionics.
No other info whatsoever
Well that could be a single still image, unless you are paraphrasing the document. It's incorrect grammar, it must be either "an instantaneous image" or "instantaneous images" or "instantaneous video". Or, are you translating from non-English?
This sounds like a project where you have little freedom and have to follow rules.
So why not come clean and tell us what the project is about, who is it for and post the rules you have to follow?
Yes and under those circumstances you should try to imagine what the other competitors are doing.
Does your sensor data, then, have to be embedded in the video transmission as in telemetry?
Hi, @liperthgar
Welcome to the forum.
Can you post a copy of all the requirements given to you for this competition?
An image of the document or a .txt file of you have an electronic copy?
Thanks.. Tom... 
They're afraid you'll sign up as a competitor?
Search this forum. There have been numerous rocket video threads, although some go back a few years.
Probably FPV gear.
Who is sponsoring the event if anyone (might give a clue as to how they want competitors to do the VTX). Also, what is the budget? Anything is possible at the right price, yeah?
I'd be scouring webpages like these:
https://www.fpvknowitall.com/ultimate-fpv-shopping-list-fpv/
Its a competition in Turkey called Teknofest. Documents are in Turkish unfortunately.We can afford 50 to 100 dollars max for each communication module. Information about the images and video is limited( 1 sentence ). Its something like , ground station must upload instantaneous image throughout the flight. (Its not saying video)