From Liisa.Juusola@fmi.fi Fri Dec 20 09:12:01 2024
Date: Fri, 20 Dec 2024 08:04:48 +0000
From: "Juusola Liisa (FMI)" <Liisa.Juusola@fmi.fi>
To: Maria Hamrin <Maria.Hamrin@space.umu.se>
Subject: VS: Question about equivalent currents

Hi Maria,

sorry for taking so long to reply, but I have been, indeed, having far too much
work before Christmas. The Research Council of Finland decided that an optimal
time for project application DLs is right after the holidays. In practise this
means that the application must be submitted before the school holiday starts.
But now mine has been sent. I'm sorry to hear that yours wasn't successful this
time. Better luck next round!

The equivalent current web page has been made by Max van de Kamp. If you like,
you can ask him about accessing the data (max.van.de.kamp@fmi.fi), but I suspect
it won't be straightforward.

Do you know how much data you're going to need? If it's a handful of days only,
I'm happy to calculate the data and send it to you. On the other hand, if you
need large amounts of data, then your student may need to download the magnetic
field data and learn to run the code (available as a supplement to
https://link.springer.com/chapter/10.1007/978-3-030-26732-2_2). In case you only
plan on calculating differential equivalent currents, you need not worry about
the baseline (except for the necessary cleaning of the data), otherwise you'll
also need a baseline method.

I'm happy to either send you the data or help in case your student needs
assistance with the code.

Kind regards,
Liisa

________________________________________________________________________________
Lähettäjä: Maria Hamrin <Maria.Hamrin@space.umu.se>
Lähetetty: keskiviikko 18. joulukuuta 2024 12.28
Vastaanottaja: Juusola Liisa (FMI) <Liisa.Juusola@fmi.fi>
Aihe: Question about equivalent currents  
Hi Liisa,

I hope you are fine and not having too much work before Christmas.

I'm contacting you right now because I will be supervising a master
student this spring and he will look into equivalent currents and
especially differential equivalent current using both IMAGE data and
THEMIS GBO data. The student's study will be inspired by ideas from
Schillings et al., 2023, on which you were co-author
(https://doi.org/10.1051/swsc/2023018).

My question to you is what is the easiest way to compute the
differential equivalent currents from IMAGE data. I notice from your
IMAGE web that one can play around with the base line time, and that my
work for estimating the differential currents. But is there any way we
can download also the data (not only as plots) from the web? And do you
have any other recommendations for us computing the differential
equivalent currents? Btw, we have also been in contact with James
Weygand for the same thing using THEMIS GBO data.

If the student's work is promising, we'll try to make a paper from it
but I cannot promise that yet. But if we succeed, you will of course be
offered to be co-author!

Moreover, very recently, we go to know that Juan Carlos' proposal rom
last year was not granted this time. However, we will try again in the
next round. :-)

Merry Christmas!

--
/Maria

-----------------------------------------------------------------
Maria Hamrin                     Email: maria.hamrin@space.umu.se
Associate Professor              Phone: +46 (0)70 325 80 38
Docent in space physics
Department of Physics
Umeå University
Linnaeus väg 24, 901 87 Umeå, Sweden
https://www.umu.se/personal/maria-hamrin/
https://www.umu.se/en/research/groups/space-plasma-physics-group/
-----------------------------------------------------------------


