I am wonder if the Onboard SDK offer raw pseudo-range, carrier phase measurement and Broadcasted emphemeris.
I have seen the API mention RTK solution but I need to get my own solution from raw measurement and raw IMU measurement from gyroscope and accelerometer and the GPS.
Thanks
At present,DJI Onboard SDK doesn't support this function. If you want them to develop it, you can fill this feedback ticket to inform them
Related
We are working on developing our own iOS app connecting with two Movesense sensors and fetching the acc, gyro and mag data. The app is going to be used for measurement of 8 hours, with 52 Hz. We'd like to collect both sensor time stamps and the phone time stamps, in order to make an accurate synchronisation of these two sensors. The default DFU settings seem to only give us sensor time stamps, which looks like this (example of only gyroscope data by Movesense Showcase app):
Should I modify the DFU, or is it possible to just state it in Xcode when getting the data package? I have tried to go through the available DFU packages and the .apk files as listed on the Movesense website. I am personally not familiar with the DFU programming, therefore we'd like to use one existing DFU package from Movesense, which is hopefully stable for the connection and data sampling.
You do not need to create your own firmware (DFU) for that. All the API's are available from the mobile phone, so just follow up the instructions given in this question & answer:
Android app dev: Finding the best way to synchronize the timestamps of two sensors
When recording using our Movesense Showcase app the situation is different since that app does not do multi sensor clock synchronisation. When recording with plain iOS Showcase app I would do "hit sensors together in the beginning and end of the recording" to synchronise the sensor data streams using the peak in acceleration. Then remember to treat the data streams as having different sample rates and base your analysis on the timestamps instead.
I am new to development using GPS so any help will be most appreciated.
Project:- I am attempting to locate gps tracking hardware for a student project to locate animals.
I do not want to use cell phone SMS or yearly subscriptions packages as this is not practical where there a number of animals to be tracked. A solar powered device would be a bonus?
My understanding is the following will be required:
A GPS receiver (to get the gps location from satelites) - result is a 'navigation message'. This hardware device would be on the animal.
A transmitter with an antenna which will listen out for radio waves on set frequencies from the receivers, amplify them and its tuner will filter based on a particular frequency.
The 'navigation message' (or number of navigation messages) would be held on the the transmitter.
I am not sure if I can get an appropriate hardware transceiver with both the receiver and transmitter in 1 that can be attached to the animal?
The data would then to be sent over the internet from the transmitter to a web server via a HTTP request and parsed to be stored on the database.
A phone app / web app could then query the database to identify where the animal is at its last stored location or analyse data to determine its route over time when required.
If you have any advice / suggestions on the process above or advice on types of hardware / location of hardware to complete this project I would really appreciate it.
Polly, here are a few commercial solutions for GPS Animal Tracking. Some are rather expensive, but at least this shows what is out there professionally.
I think one of your primary issues here is battery power, size, and weight. GPS receivers use a fair bit of power when on, so it would have to be "off" but for a few seconds every-so-often, the rate determining how long the batteries will last. Solar recharging is an idea, but is that compatible with these particular animals?
If you wanted to construct something like this, there are a vast array of GPS modules to start with, depending on how integrated and customized you want to get with the idea. But these are receivers only - they will not broadcast anything. To get the GPS data remotely, you're going to need both a way to store the GPS data, and a transmitter (your #3) to send it to you. Since the transmitters would be small and low-power, this will limit the range you can receive them from. Not impossible, just a little more challenging.
Is a web developer available that can write that web and database code?
Is a phone developer available for the phone app?
Here are some interesting articles from others that have DIY their own low-budget trackers. I hope this gives you some ideas.
I am working on a project that deals with GPS based tracking of vehicles. I want to know if we can use GPS data for real time tracking of vehicles in areas where there are no cellular services.
Yes you can, GPS works everywhere in the world, when you have free view to sky.
It does not work in tunnels, underground and indoors.
Without cellular service the phone needs some seconds more to get the first valid GPS position after enabling it.
We are planning for vehicle tracking system. We would like to relay on GPS Tracking System and view position report via Google Maps.
For hardware requirement we are thinking of GPS modem that can transmit data to our system.
Which GPD Modem is suitable for my project?
Use a smartphone. Haha.
On a more serious note, since it's for vehicular application only, there are a lot of companies that manufacture GPS modules (u-blox is one of them). Just google and you'll find thousands of companies manufacturing them. But before you choose a GPS module, make sure you check the regulations of your target country. If the module works on the Iridium satellite network, countries like India & China won't allow it as Iridium frequency is close to their military frequencies. In Europe you'll be better off with the Inmarsat network. So, do your homework & you should be good.
Also, if you're developing your own map interface, you might wanna ask the manufacturer if they have any existing mapping interface you can hook into or disable. You mag be charged for either.
All the best!
Are mobile networks (like GSM/GPRS/UMTS) available where you are?
if so check-out the tracking products from this site or this site (Google keywords: GPS GPRS)
If not, you should consider a custom solution, maybe someone like this company can help...
I have worked on a project that involved sending data over GSM/CDMA network. It used a simple GSM/CDMA modem connected to an embedded linux device and was a stationary piece of hardware. Attach a GPS device and it may very well be a tracking system. The problem is when the network drops or the device moves out of the network coverage area. I am not sure if there any GSM/CDMA modem available with GPS added to them as we didn't have this facility in our hardware and it was very much desirable. We needed to use a separate GPS device, mostly iPhone, separately to determine the lat long of our device.
You can use any GSM/GPRS modem equipped with GPS device. The modem will forward the GPS data to your central server through GPRS and at the server side you just need to process rcvd data and display it on google maps.
all the sets will not have inbuilt gps connectivity....for example mine is sony Ericsson z550i in this i dont have inbuilt gps service. suppose i want to use gps service in such sets what i should do? please Suggest some alternatives...
And also suggest is it mandatory to have a gprs connection for my handset if i want to avail gps service?
GPS does not require any cellular connection like GPRS, it relies purely on a GPS antenna on the phone picking signals from orbiting GPS satellites.
If a phone doesn't have a GPS system, then there might be other APIs available to obtain an approximate position from cell tower information, but generally speaking I think you're out of luck.