Reflection Tests 061324

I have finally started to see some change in the output. I would like to make a venture by saying that I could be seeing external effects. That is something beyond the system consisting of the RX and TX chain is having a ramification on the output. If true, then what has happened is I have advanced the SNR enough with the prior changes that I’m picking up atmospheric conditions.

A color scaled image of the doppler shift. It shows a widening of a large gap at about 10km above the ground towards the morning hours. The left side is staying steady but the right side, higher altitudes, is increasing in altitude. The region of interest is blue in color depicting a shifting down in frequency while other regions are reddish depicting a shift into a higher frequency.

A color scaled image of the reflectivity. It shows an elongation of the reflectivity and an increase in intensity towards the end which corresponds to early morning hours.

A color scaled image of phase. The phase is shifted about due to the differences in timing. It shows some change towards the end.

A color scale image of the phase delta. It shows a fairly stationary process with some increasing intensity in phase change toward the end in a single band.

There is a white region which I’m not sure of the exact cause. It may be NANs or it could be where I changed the interval of sampling to 15 seconds. I do not think it is having the widening effect seen in the doppler shift. I can also see that the reflectivity is picking up in intensity and elongating in altitude but that does defy my expectations in a bad way. I’m also not seeing any change in the phase delta or at least not a change I can see with my eyes which is bad.

At this point, my hopes are not high. I’m not seeing expectations but at the same time I am seeing some change that could be from atmospheric conditions. It could also be from ground temperatures in the room with the equipment but if this is the case I should see the cyclic nature over a few days of it along with some variation correlating with pre-dawn temperatures.

The only thing I can do now is wait longer and see how the change unfolds.

After a Few Hours

A few hours later, the output is still showing some interesting variation. I’m hoping the variation continues showing smooth but consistent changes as these should mimic atmospheric changes if they are to be true.

After a Day

A color scale view of the doppler shift function. This image is talked about in the paragraph following it.

The 24-hour view is interesting. It shows significant variation around 10km. The cause is not known but it certainly does change over time. I will have to continue watching it to see if there is any repeat on a daily basis.

The weather has been fairly clear with some scattered cloud cover. Seeing a how this is likely a very low SNR if the data is correct, it might take a considerable change in the weather to show a considerable change in the output if the two are correlation. This means I’m going to have to wait and see.

Conclusion

The test continues to run.