04
Dec
24 |
Upload nov24.dat into the data archive. |
02
Nov
24 |
Upload oct24.dat
into the data archive. |
24
Oct
24 |
The CO2 channel went wrong in mid 21 October; Raoull Tholl made the
repair today (culprit was a signal contact going bad) |
06
Oct
24 |
The inlet filter of the Cairsens O3&NO2 sensor has been replaced by
Raoul Tholl. |
02
Oct
24 |
1.
The Dobson readings (Total Ozone Column) have been updated up to
2Oct2024; the
Excel
file comparing the meteoLCD and KMI TOC readings has also been
updated.
2. TOC Dobson and UVB readings transferred to WOUDC |
01
Oct
24 |
Upload sep24.dat
into the data archive. |
16
Sep
24 |
1. Dobson data for August 24 uploaded to WOUDC
2. Problem with graph of DU readings at DOBSON page corrected |
12
Sep
24 |
The WBGT measurements have been put on hold. Clicking on the "Not
Measured" icons nevertheless shows the GlobeT and DryBulbT (which
will be essentially the same as the WetBulbT, as the wetting has
been stopped). |
11
Sep
24 |
I (Francis Massen) had a serious accident 2 weeks ago, and am in
rehab for the next 5-6 weeks. Internet access is possible, but there
are many restrictions making the normal work difficult. I found some
work-arounds, but for instance the update of the graph on top of the
table of the Dobson measurements does not work. Look at the Excel
file linked in the text above for a plot of the readings.
My colleagues Raoul Tholl and Marco Goffinet will keep the hardware
running. |
06
Sep
24 |
Upload aug24.dat
into the data archive. |
27
Aug
24 |
The lightning computer was out of action for several days... ok now
again, radar screen page fine.. |
17
Aug |
New short paper by Francis Massen:
"A
short analysis of the temperature dependence of French Provence
cicada chirps frequency and ambient air temperature".
A verification of Dolbear's law from 1897. (update to version 1.1
done 18Aug24) |
06
Aug
24 |
The problem with the computer driving the datalogger has been
solved, thx to Raoul Tholl. Everything ok again since today
09:00 UTC... The jul24.dat file will be updated asap...
12:40 UTC: definitive full version of
July 2024 data is uploaded |
03
Aug
24 |
1.
Upload jul24.dat
into the data archive: Attention due to logger communication
breakdown the 31Jul24 after 07:00 UTC, there are 34 missing lines at
the end of the file; they have been flagged by 9999. 2. There is a
problem with the graph of the total Dobson column (TOC) data; the
table valeus are ok, but the update to make the new graph is not
working correctly for the moment. 13:35 UTC: the Dobson graph
problem is solved. |
01
Aug
24 |
There is a serious problem with the computer interrogating
the datalogger, starting the 31 July after 07:02 UTC. I was unable
to restart the computer from the distance. So no download of the
July 2024 data is possible for the moment.Sorry! |
20
Jul
24 |
Again a tiny thunderstorm, which managed only to go North up to the
midst of Luxembourg; click on the picture for an animation:
 |
16
Jul
24 |
There was a problem with the half-hour downloads of the data from
datalogger to computer. Real cause remains unknown. All ok again
(17:00 UTC), there are some glitches in the graphs to ignore... |
15
Jul
24 |
We had a very "normal" thunderstorm, despite an awe inspiring
warning issued hours before by the authorities; click on the picture
for an animation.
What's interesting is that the storm moved very quickly: compare
the position of the most recent strikes (blue crosses) between picture 2
and 3: it is about 18km for an interval of 6 minutes, which gives
about a maximum speed of 180 km/h ! (could be a bit less, ca. 154
km/h, if one uses the time-stamp of the screen-capture). |
01
Jul
24 |
Upload jun24.dat
into data archive |
29
Jun
24 |
1.
I noticed this morning that the current sky image from our webcam
has not been updated (for a long time): actually the camera was dead
. Problem was, as so often, a bad contact. All ok again since 12:00
UTC. 2. We had a rather nice storm in the evening. Look here at
the animated gif; the first two pictures show the screens of EUCLID
and BLITZORTUNG. The next are those of our Boltek, spaced at 2
minutes interval:
There was a problem at the beginning, with the computer showing
nothing. A reboot solved this. |
14
Jun
24 |
The CAIRSENS O3&NO2 sensor has been refitted with a new filter at
12:30 UTC. A new filter will take some time to reach constant
operation. |
07
Jul
24 |
The problem with the graph of the TOC has been solved. The cause of
the malfunction was so silly that I can not mention it.... |
05
Jun
24 |
There is a problem with the graph of the TOC values (Dobson values).
As another possibility, click on the
link to the Excel file to see two graphs related to meteoLCD
and Uccle TOC values. |
01
Jun
24 |
Upload may24.dat
into data archive |
02
May
24 |
1.
Upload apr24.dat into data archive
2. First thunderstorm for this month ( time = UTC = local time -2):
 |
01
May
24 |
Restarted WBGT sensor assembly at 12:00. Watch how the web
bulb temperature starts to become lower than the dry bulb
temperature... |
15
Apr
24 |
Today we had our first real thunderstorm, short-lived. Click
on the picture for a full animated GIF showing the progression from
South to North. The blue crosses are the latest strikes, the yellow
dots the older ones. The hashed squares are the location where the
software thinks the storm is mostly located. Watch how these domains
progress to the North. Time is UTC ( = local time - 2).
|
01
Apr
24 |
Upload mar24.dat
into data archive |
03
Mar
24 |
Upload feb24.dat
into data archive |
01
Mar
24 |
Our vintage Delta-T logger does not know about leap years... so it
took the 29th Feb as first March. The monthly data file will be
corrected, but the plots (today, last 7 days) will be a bit
strange... best ignore this,as everything is self-healing. |
08
Feb
24 |
Trends analysis for 2023 now finished. For the comparison of
the meteoLCD TOC readings with those of Uccle, only the month's Jan
to Nov are used, as the Uccle data are not yet available on the
WOUDC site. The comparison with the "WebUccle" readings covers the
full year. |
07
Feb
24 |
There was a remaining contact problem with the pressure sensor,
corrected this morning at 08:00 UTC. I also removed the pressure
correction applied to the Gnuplot CO2 graphs, as the pressure fault
made these plots absolutely wrong... |
06
Feb
24 |
The CO2 problem is solved (13:0 UTC); there was a bad contact on the
cable connector to the Vaisala GMP343 sensor. The 7 days plot will
be bad for a week due to the the autoscaling feature of Gnuplot. |
05
Feb
24 |
There is a problem with our CO2 measurements starting the 30th
January, Will try to solve asap... |
02
Feb
24 |
Upload jan24.dat
into data archive.
Trends page update to 2023 trends nearly finished; PM2.5 fine
particle data and TOC (total ozone column) in work. |
14
Jan
23 |
I started to update the
trends page..
this is ongoing work. |
10
Jan
24 |
Uploaded into data archive
2023_only.xlsx Excel file with all readings, dailys and
monthlys and monthly Findel values. Also
meteoLCDstats_1998_2023.xlsx statistics file.
|
01
Jan
24 |
1. Our old faithful Delta_T datalogger does not store the
year count in its data-time column, so there usually is a mess with
the Gnuplot 7-days plots during the first week (but not with
the "today" plots).
2. Upload dec23.dat
and full year 2023.zip
data into data archive
3. Look
here for a comparison between our total ozone column
(TOC) measurements with those published by the RMI at UCCLE on their
web-site (only common days retained). Theirs is probably a mix of direct sky (DS) and zenith-sky
(ZS) measurements, whereas we only measure DS. As usual ours are not
too bad, no reason to be ashamed of ! And please remember that
meteoLCD is since more than 20 years the only station in Luxembourg
measuring TOC (and recognized by the
WOUDC as station 412). I want especially give thanks to Mike
Zimmer for helping out with these measurements.
|
