Who likes this app
- Thread starter Tom skerke
- Start date
MNT DRONE SOLUTIONS
Well-Known Member
Jagerbomb52
Well-Known Member
Jagerbomb52
Well-Known Member
wfish
Active Member
TroyMich
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- Joined
- May 1, 2020
- Messages
- 32
- Reaction score
- 37
- Age
- 77
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- Oakland Township, MI
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- troymich.zenfolio.com
Jagerbomb52
Well-Known Member
UAV Forecast
UAV Forecast combines weather forecasts, visible GPS satellites, and solar flare (Kp) activity, to produce a comprehensive report and forecast of flying conditions for Unmanned Aerial Vehicles.
www.uavforecast.com
I like it except it says not good to fly and if I obeyed, where I live I would never get to fly. I think it's the wind.
wfish
Active Member
Yes, especially if you conduct missions under part 107 (commercially). The paid subscription allows me to better manage my work schedule several days in advance. I include the data in every preflight plan.
Jagerbomb52
Well-Known Member
UAV's over the years have been improving so much that no its not to important anymore if you have one of the newer units. Most have back up system's for compose, GPS and IMU so if one fails or gets confused the others step in. I have never been a big believer in how the KP affects our crafts but some swear by it. That argument will never end. All I can tell you is I have flown when the KP is at 9 with no issues at all. Some people will not fly when its 4 or over. Here is a post from a user that works in the industry. I tend to side on his wisdom. Others may not.
"
A little primer on geomagnetic storms and GPS.
A geomagnetic storm is when a shock wave from a solar flare smacks into the earth's magnetic field, which triggers a lot of disturbances in our ionosphere due to a wiggling magnetic field and increasing the electron density. Huge geomagnetic storms (K index 8-9) are rare. The triggering flare has to be huge (an M or X class flare), located near the center of the sun to directly strike the earth, and one that produces a strong coronal mass ejection (CME) - or the shock wave. The CME usually takes about 3 days to strike the earth following the flare. If conditions are right, it can trigger a major geomagnetic storm which usually has a duration of several hours.
During a major geomagnetic storm, GPS signals from the satellite to our UAV's GPS receivers gets bent by the increased electron density, which increases the path length and introduces position errors. The disturbed ionosphere can also cause degraded signal-to-noise problems, meaning your receiver may loose lock on one or more birds. Also, the bending of signals can also cause "phase slips, which can also cause the receiver to temporarily loose lock on the GPS, taking a few seconds to tens of seconds to relock on the dropped satellite.
Scientific experiments done during strong geomagnetic storms shows the bending of the path length can cause up to about 30M (100 foot) errors in position at mid-latitudes (like the US/Europe and Australia), and slightly worse near the equator. Again, this is during a MAJOR geomagnetic storm of K=8 or 9. Thus, I would expect no effects to a UAV below K=7.I have flown in K7 with no ill effects.
With K=8 or 9, I would expect the following effects to a UAV:
A position error of around 100 feet would not normally be catastrophic. The position error is not going to make your UAV fly a mile away; just 100 feet or so. This would only affect your RTH position and landing point. It might skew the onboard compass off a few degrees, but probably not noticeable. If you're still tracking 6+ satellites, just bring it home (assuming you even notice anything).
With poor signal-to-noise or phase slips, the UAV GPS receiver will loose lock and drop into the manual mode. Bring it home in manual mode.
Again, I wouldn't expect any effects until a MAJOR K=8 or 9 geomagnetic storm, and nothing that is going to cause the UAV to not know where it is more than a 100 feet in error (not a fly away). Go here to see what the K index and general space weather is:
Homepage | NOAA / NWS Space Weather Prediction Center These are the guys that measure things every hour.
Do not listen to warnings issued by the major news media. Every flare lately seems to be an end-of-the-world news story, and furthermore, a solar flare means a POSSIBLE geomagnetic storm 3 days later, not right after the flare.
We have enough to worry about to keep our UAV's flying safe from proper calibration, good batteries, pre-flight check-out, and the various things that can go wrong (a weak ESC, smacking into a tree, loosing LOS, etc.). The geomagnetic storm concern doesn't even make the top 10, in my opinion. Let's focus our worries and concern elsewhere."
I use it mainly for the wind altitude feature, but try not to get to attached to it. Many of the data points are just totally wrong a lot of the time. Yesterday it reported 1% cloud cover when it was completely overcast out, and frequently reports no rain when I've got active thunderstorm warnings.
Also, from what I've read it's powered by Dark Sky, an app Apple decided to buy and immediately extinguish on Android. The Dark Sky API will also shut down next year so it's a little unclear what the future of the app looks like after then...
Also, from what I've read it's powered by Dark Sky, an app Apple decided to buy and immediately extinguish on Android. The Dark Sky API will also shut down next year so it's a little unclear what the future of the app looks like after then...
That's good to know. I was thinking about giving the app a look but I may not then if the api they hook into is going to go away.
I've been making use of Ventusky.com, they have an app but I prefer websites over.
