Welcome to the free ocean tide loading provider
Saturday August 30, 2025
New Ocean model included: TPXO.10.v2a
It
is only available via the portal on Barre,
i.e. on this machine.
Friday August 1, 2025
New Ocean model included: GOT5.5
It
is only available via the portal on Barre, i.e. on
this machine.
Tuesday April 8, 2025
New kind of behaviour when users log in anonymous
For returning users bestowed with a unique proprietary
User Area, the Email address filled in on the Form
page is used
to retrieve its Token. This saves a flood of new
Tokens and User Areas with little content.
Requests and results will end up in the same place.
Drop us a note if this creates problems for you.
Thursday February 20, 2025
Problems
with long upload files.
The system did not
split them into individual jobs with 100 station
lines as intended.
The
calculation was not carried out, and you should
have received an email saying "Too many stations."
The problem has been solved today.
Wednesday December 18, 2024
New Ocean model included: FES2022 (AVISO)
It
is only available via the portal on Barre, i.e. on
this machine.
Thursday September 26, 2024
Renewed/Updated Instructions for sending
requests by direct mail
Tuesday September 3, 2024
1. On Login, the upper text box
You can in fact enter a token without :email@address
appended, but only if you have successfully created a
job so that a User Area has been made and your email
address has been registered at login before.
The simplest option still is to log in with you email
address.
2. On Uploading files
Some users ran into a problem when the last line of
the uploaded file was lacking a carriage-return (line
feed character) at the end.
This had created jobs for which the email address got
lost (it's supposed to a appear in the line following
the stations.
Now the system always adds a line feed.
Please avoid to upload files whose names include
blanks.
Tuesday July 16, 2024
On User Areas, a malheur
A severe misbehaviour of a script for maintenance
tasks has removed practically all User Areas
dating from
2024-06-21 to and including
2024-07-15.
This will also affect the automatic token assignment
for users that have created requests during this
period.
I you need to re-access results, send me an Email - we
might have copies.
Copies of requests are irreversibly lost and so are
the kml-files.
Alas, the auto-assignment table has been updated to
recall requests up to 2024-06-20.
If you log in with your email address, the top part
above the Form Page will show the User Area(s) still
accessible to you.
Look for "Searching your request history ..."
I sincerely beg for your mercy /
Hans-Georg
Scherneck
UPDATE
2024-07-17: Results computed at OSO have
been recovered.
Some of them might duplicate files already in
residence.
Monday July 15, 2024
On login: Assignment of tokens from user history
Supplying only the Email address in the top box of
l.php, the system will pick up the token most recently
used with this address.
There are some advantages:
- For the user: The parameters and station
lines in the Request From are pre-filled from the
recent request. New station lines can easily replace
the pre-filled ones. Select them with the mouse
highlight-and-sweep function and copy-and-paste-over
the new lines from a another window. They just
shouldn't include TAB characters.
- Also, copies of all results computed in suit and
related stuff will be found in the same User Area.
- For the system: There will be less tokens to
be stored and folders to maintain.
Saturday May 25, 2024
On the Station File Upload feature
From today on the system copies uploaded station
files into the User Area if they
- pass tests for sanity so they comply with the
format requirement: Plain text like the station
records accepted in the Request Form's text area
- are not identical to a previous upload file
The file name in the text area will consist of the
Token's first six digits appended with the date and time
of the copy and ending in
_upl.dat
You
remember how to visit your User Area?
What can you do with the copy?
You can download it to you computer and include it in
the next upload after making changes.
The plan for the next update is to make these files
selectable on the upload page, so you can easily
reprocess them with other parameter settings (ocean
model, Green's function, CMC ...).
On a quick login alternative
Once you have a Token registered and have supplied your
email address at your first login, you can use the URL
https://barre.oso.chalmers.se/cgi-bin/reenter.cgi?Token=token:email
You know the format: Example
12345_20240525111505:user@location.dom
On the last page of your request's proceeds the URL is
printed ready for bookmarking it.
Actually, you can change your email address. The change
will be noticed in the upper part of the Request page.
You can also append the ReplyTo address,
https://barre.oso.chalmers.se/cgi-bin/reenter.cgi?Token=token:email&ReplyTo=email
At the moment, there is still an intermediate step where
you must click a
PROCEED button. We shall try
to automate this, but that requires javascript running
on your machine.
Monday May 13, 2024 - Friday May 17, 2024
UPDATE
There were persistent problems with User Areas:
Previous results and requests have been overwritten.
The issues are cured now.
Sunday May 12, 2024
Rules for keeping the User Areas
With every new login not opting for re-using a Token, a
new User Area is opened. In the long run, this leads to
swamping the hosting folder. It may also become a burden
for frequent users to keep a record of their Tokens.
Thus, we strongly suggest to login with
token:email your next time
round.
We shall enact rules to trash User Areas that
haven't been used for some time:
- User Areas neither holding a request file nor
results will remain available for 48 hours.
- User Areas with all files older than 200 days will
be removed.
We welcome your opinion in this issue before rules
are made routine.
For instance, would you appreciate a renewal of files'
date stamps every time you visit you Users Area; you
might need to retrieve results after long time passing.
Or you can express, I won't have use of the User Area
feature.
Send email to Hans-Georg Scherneck at
hgs_kanelbulle_chalmers.se
Friday May 3, 2024
Concerning the mail system problems with Holt:
The current status is that the job status on Barre's
queue page is working independently and well.
If you find it tiresome to go through our web
interface, you can send email to the loading provider
in a
special format.
Introduction
With the growing number of precise geodetic
observations, the requests for ocean tide loading
values have increased considerably. Therefore, this
webpage has been created in the hope it will help the
geodetic community. Just select an ocean tide model,
tick the required type of loading, fill in the
coordinates of the stations, give your e-mail address
and press the submit button. The program will check if
it can read your input and if so, will calculate the
values and send the results to you by e-mail. The
program will take about 5 minutes per station. An
example of the output in normal BLQ-format can be
found here
while an example of the output in the new
HARPOS-format can be found
here .
Contact
Send email to Hans-Georg Scherneck at
hgs_kanelbulle_chalmers.se
Jobs with ocean tide models FES2012, FES2014b,
TPXO.8*, and TPXO.9* are carried out at a Cload
service. If you suspect hang-ups, please cc to Machiel
Bos at machielbos_kanelbulle_pm.me
NEWS
IMPORTANT:
A Code of Good Conduct - please read
carefully.
March 11, 2022:
Extended parsing of requests
A more thorough parsing of station records has been
enacted. Requests that fail the test will not be
processed.
Instead, the system sends a notification back to the
user with hopefully useful advice.
February 03,
2022: New model TPXO.9.5a
This is a 1/6×1/6 degree model, an update of TPXO.9.2a
December 2021:
Stricter coding requirements for direct email
If you bypass the web page and instead send your
requests by email, we refer to
updated instructions as users had been
experiencing denial of service.
April 25, 2021: New model EOT20
(Hart-Davis et al., DGFI, doi=10.17882/79489)
July 12, 2021: Problems have been found recently. A
revised version has been installed today at 10:00 UTC.
Please resend your requests issued before this date.
August 9, 2020:
Error in GOT4.10c with centre of mass option
Tides Q1 and K2 had erroneous coefficients for centre of
mass.
Please
resubmit your sites if you have used this
combination of options.
June 26, 2020:
New model TPXO.9.2a
March 7, 2020:
Error in our copies of GOT4.10c, Q1 and K2
amplitudes, corrected.
For
high-precision applications, the set of loading
coefficients should be recomputed.
January 6, 2019:
New model TPXO.9-Atlas
A high-resolution model, 30x30 cells per square-degree.
Loading jobs are carried out at a Cloud service.
February 05,
2018: Alternative loading Greens function available
For decades the load convolution used an elastic Greens
function based on the Gutenberg-Bullen earth model. You
can choose an alternative, a Green's function for an
anelastic Earth
[...]
.
Further
reading: Bos and Scherneck (2013)
February 05,
2018: A
pro-memoriam on BLQ files (updated)
with emphasis on phase and its conversion for reckoning
with respect to the local solid earth tide.
February 05,
2018: Revision of service for gravity and tilt
Today the service goes official with tilt parameters
[...].
February 05,
2018: Revised version of converter script olgt.pl
in perl, now named
olgte.pl
for converting BLQ to the format accepted by
TSOFT and
g-Software
(Micro'g Lacoste),
[...]
(old news)
