Day Fourteen - The Saga Continues...
I shall be switching over to DLETE in about 6 minutes. Mike will begin tuneup at 8 UT and then we will modulate at 08:10 UT. The pattern I chose basically swaps short bursts for longer on periods in 20/30/40 minute cycles. This provides several oppurtunities to decipher the heating effect in the D-layer by integrating over cycles without having too much variability in the ionosphere from the start to the end of the cycle. Well that is my intention.
So far the PAMS run has been a pretty good success. The increased electron density at ~6:15 UT has hung around and in fact has shown signs of long period quasi-periodicity. Thus I have managed to capture an example of both standard ULF and quasi-periodic precipitation in this campaign.
In addition since ~7:20 UT there has been a varying but generally consistent signature at about 68 km altitude in the electron density. This has all the hallmarks of being PMWE. It may hang around as we begin to heat which would be interesting. I wonder how much Mike Kosch might pay me for access to this data :-)
Although the data is good for PAMS I am happy to switch to DLETE. The increased D layer provides an excellent target plus the results of modelling by SGO indicates that the effect on absorption is very small (hence much integration). So as long as we analyse carefully we should be confident that any effects to EISCAT are solely in the spectral width and not in the electron density and are unlikely to appear in a time series beyond the noise. Thus this DLETE data will be good for PAMS studies also.
I think.
The PMWE might have disappeared, though it is hard to say as we got some very intense precipitation down to 65 km around 8 UT. DLETE modulation actually began at 08:15 UT after a slight cock-up between local and universal time.
So far the PAMS run has been a pretty good success. The increased electron density at ~6:15 UT has hung around and in fact has shown signs of long period quasi-periodicity. Thus I have managed to capture an example of both standard ULF and quasi-periodic precipitation in this campaign.
In addition since ~7:20 UT there has been a varying but generally consistent signature at about 68 km altitude in the electron density. This has all the hallmarks of being PMWE. It may hang around as we begin to heat which would be interesting. I wonder how much Mike Kosch might pay me for access to this data :-)
Although the data is good for PAMS I am happy to switch to DLETE. The increased D layer provides an excellent target plus the results of modelling by SGO indicates that the effect on absorption is very small (hence much integration). So as long as we analyse carefully we should be confident that any effects to EISCAT are solely in the spectral width and not in the electron density and are unlikely to appear in a time series beyond the noise. Thus this DLETE data will be good for PAMS studies also.
I think.
The PMWE might have disappeared, though it is hard to say as we got some very intense precipitation down to 65 km around 8 UT. DLETE modulation actually began at 08:15 UT after a slight cock-up between local and universal time.
posted by Kav at 8:52 am
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