Zezo grib
Post by iconPost by PRAMAC | 2025-02-01 | 13:45:33

Dear CVETAN,

first of all thank you for maintaining this wonderful tool that is zezo for so many years. Would you agree to share a link to download the grib 0.25 file or give us access to the base of the script so that I can create the grib on my side. My goal is not commercial...I only want to check if Adrena is capable of routing differently from zezo, at worst I would just need a file once to compare.
THANKS

commenticon 5 Comments
Post by iconPost by PRAMAC | 2025-02-02 | 16:03:57
Hello, without any response, I am continuing my investigation.
I managed to create a script that allows me to download the GRIB files from the game. However, I don’t understand which files to use for the first three timestamps (0, 3, 6). I also don’t understand how to create the final GRIB after transitioning between the old and new data.
Post by iconPost by PRAMAC | 2025-02-02 | 19:33:38
CVETAN

I finally succeed using your javascript file ton create a correct file, always few degrees and knots lost or win compare to your reference data....

Is VR store somwhere .webp files or what is the logical for manipulate gribs file to .webp, i understand you must recalculate data for minimum low wind but i can't understand perfectly
Post by iconPost by PRAMAC | 2025-02-06 | 12:40:33
the value of "minu" and "minv" seems to be dynamically constructed...does anyone have any information or values ​​to share with me regarding this value, thank you

Post by iconPost by latruffe | 2025-02-06 | 13:47:23
Apparently retrieving the grib files from the game is not the best approach :the grib files used for the actual calculation on the server side are the GFS files, when the ones used in the interface are �simplified�. Not sure if it is true or not, hence the conditional. Best is probably to identify the files consumed by VR and redownload them from NOAA. As long as it exists.

Also VR only uses the file T+009 and T+012. Others are not used.
Post by iconPost by jacme31 | 2025-02-18 | 13:00:16
Personally I download the noaa files and assemble them as VR does (combinations of steps 9 and 12).
I compared the values ​​of u10, v10 and tws, twd on points of the grib mesh (to avoid spatial interpolation) at different times with esail4VR (the easiest tool for manual wind surveys). I quickly saw that the temporal interpolation is done on the u, v values ​​(and not tws, twd) but to have values ​​that coincide perfectly I had to modify the "scaling" of the noaa data (dec_scale=-2 bin_scale=6 nbits=7).
For information the gribs retrieved from the game interface have the same precision.
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Figaro 3 Polars Winches
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Bit Sailor Router in RealSail
2
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Modification de destination
1
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Silent debugging
14
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How to manage buoys during absence
6
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Vela- route choosen by your mom
6
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VR Team ranking race criteria
1
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No news from Virtual Regatta about VOR (the ocean race).
1
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Log-in VR game marathon..
5
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VR Dashboard
5
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Dashboard - Precdicted Time ATLANTIC RECORD
1
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the prawn star
9
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polars virtual regatta
8
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how to convert Grib files to Grib2?
3
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VSR, XP points
7
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Predicted times
3
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Nord Stream *3*
11
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Game on 12Z, but Zezo still working with 06Z
3
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race wait points
1
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special boats?
7
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VR Dashboard in Firefox?
6
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ESCARGOT CLASS
11
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Los Angeles - Honolulu
26
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Rounding a Buoy
12
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VR Waypoint Heavy Bug Reporting
3
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Time of ending Jules Verne
4
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Shore detection by Zezo
2
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Nord Stream Race 2
7
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Trying to Break the VR Map Mistery !
3
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Navigating to "xxx.0" TWA
26
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Tara4 - no refresh
2
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Jules Verne: Inconsistency of headings and speeds, simulation !!
5
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VR, Zezo, Qtvlm card offsets
2
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Island's coordinates
34
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Tara Ocean 4
6
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Solo Maitre Coq
21
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Adjustable timeshift ?
3
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gate crossing question
7
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Expanded View on PC
3
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Panic at VR Nord
7
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Delays during the sail changes, or directions changes
3
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(Game wind = Zezo wind ) ⍯ (Grib winds = Windy.com)
7
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VR ending the ELO ranking.
34
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NMEA feed
128
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Dashboard Map Track Label not including the segment.tag
5
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VR ingame time
6
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VIRTUAL REGATTA and Phillip Ganier. Worst and worst every day...
7
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beta.realsail.net
2
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Escort Frigate
6
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Out of memory. If you are the developer of this content ....
17
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Question about GFS Grib
5
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RORC Caribbean 600
14
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sliding VSR
16
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Trying to use Zezo to select best combination of sails to select
7
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TARA OCEAN 3
9
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RORC Transatlantique Race
6
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Game appears stuck on 00Z weather from yesterday
4
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Sydney to Auckland
28
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Personal Message pages deleted
7
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New zezo fonction
2
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VR Ranking 2021
7
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Autosail malfunction
3
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Comments from a newbie to "long term" routing
1
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Massive thanks to Cvetan
7
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Fleet section mode record not working
2
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Possible routes on the Map tab
3
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Purple skippers on VR Dashboard
3
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UTC or CET time ?
2
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multiple routes?
2
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Real Sail
4
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Map a little gloomy
8
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Trophée Jules Verne - Route à l'envers ?
2
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Looks like weather updates offline for next 18h
26
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Bring the good old days back
7
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All.grib 0.0k ?
9
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different speed
3
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Strange 0.5 mille VR Scale
3
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Just an idea for a new feature...
7
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Connexion impossible
1
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Donations
7
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New leader - seems to be using Zezo
38
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Bravo Zezo
4
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zezo : Huge job - Huge thx
2
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Difference between boat speed display on VR, dashboard and polar curves
7
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Vendée Globe: Track lines falling too short of ischrones
8
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Tara Ocean
29
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VR winds currently not up to date ?
1
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"Sails Change" within the Programming
3
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RORC Transat finish moved to Antigua
3
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Weather update not appearing...
19
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Dashboard not updating.
6
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