Sailonline.org - Online Sailing

Facebook

Login

Support Sailonline

If you haven't already - join the SAILONLINE YACHT CLUB!

Please also consider making a donation - all amounts are greatly appreciated!

Tweets by @sailonline

Board » Technical Support » qtVlm thread

Page: First Previous 6 7 8 9 10 11 12 Next Last

Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-11-29 08:52:01 - qT barriers problem.
	Viva all. Since some time I have this issue concerning the use of barriers. The qT I'm using is the version 5.4-3 Nov 1.2016. Now the issue (pls see also the attached PDF file). 1 - I've open a Grib file for the West Atlantic. 2 - Created a new barrier in the China Sea. 3 - When I zoom to all the Grib's grid space I get two horizontal lines that come from the China Sea created barrier!? 4 - If I want to make a routing N-S in the Atlantic intersecting the Latitudes of those two horizontal lines, I just can't, 5 - unless I clean that barrier. I would like to know if: A - This is a problem? B - The rest of the qT users have the same issue (assuming it is one)? Thank you. Sail Fair. Attachments qT_barriers_problem..pdf (395.4 KB)
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-11-29 20:10:51 - Re: qtVlm thread
	Can you send me your poiReal.dat please (I guess this is already corrected but just to check) --- Dernière modification par maitai le 2016-11-30 07:58:14 ---
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-11-30 08:58:36 - Re: qtVlm thread
	Viva Philippe, Good morning. I’ll send you the requested file (“poiReal.dat”) but mind you that, meanwhile, I had to remove the Sea China barrier so I could perform the Atlantic routings. Otherwise it was impossible to do it, unless changing the routing option for “Avoid barriers”, which is not an option if we really need “barriers” to be active. Even now, that I’m making a routing for the X2X race, the polylines from other barriers are generating outside the actual Grib Grid horizontal barrier lines on other areas of the globe. Thank you & BH João Sail Fair.
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-11-30 09:43:53 - Re: qtVlm thread
	Thanks for the report João That's fixed and will be in the next release, due very soon, probably today.
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-11-30 22:12:02 - Re: qtVlm thread
	5.4.4-beta1 out on VW (http://www.virtual-winds.org/forum/index.php?/topic/7575-qtvlm/&do=findComment&comment=271697). Please take your chance to complain/report/suggest before official release
Posted by Bimmer Posts 447 Registered at 2015-02-23 15:38:27	2016-12-10 06:52:28 - Re: qtVlm thread
	Hey Phillippe When I draw a heading, the numbers are so small that I can't read them. Is there a way to enlarge them?
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-12-14 15:34:25 - Re: qtVlm thread
	Confusion when increasing TWS Wind Grib. Viva Philippe. Good afternoon. In the qT tab “Advanced settings” tab included in the “Routing settings” menu, there is an option to increase the Wind speed by a percentage that you specify - pls see also attached PDF file. Made a first test routing with no increase (100%) in the Wind speed and got the first route (blue path). After, I’ve made a second test routing the Wind speed increased by 15% (115%) and got a second and different route from the first one (purple path). But what puzzled me was the info I’ve got from qT before the second routing became the second route: “This routing has been calculated with an assumption modifying grib data”, (so far so good). The problem came after when, in the same info window had this: “The route will not take this scenario into account. Are you sure you want to convert to route?”!? Well, the two routings were made from the same start and finish marks, starting exactly at the same time. The only different was a15% increase in the TWS for the second routing. Anyhow, I’ve got two different routes. The question. If, as said in the info window that: “The route will not take this scenario into account.”, how and why do we obtain two different routes? Does it really takes, or not, the effect on the routing and corresponding route the TWS increase? Thank you and a BH. João/psail Sail Fair. Attachments Increase_TWS_by_.pdf (552.5 KB)
Posted by maitai Posts 114 Registered at 2016-02-25 08:15:33	2016-12-14 17:07:36 - Re: qtVlm thread
	The what-if mechanism only applies to routings, not routes. So once converted in a route you loose them. You get 2 differents routes because although the route ignore this setting the routing founds other points, of course. So the 2 routes are different, but they are using the same wind. There is another way to achieve what you want: In configuration->grib, you can specify a global correction on wind (TWS). Run a routing with this modification, convert it in a route etc, and then FREEZE the route. Then you can reset this setting (or change it) and do a routing->route again, and compare the routes.
Posted by JB Posts 305 Registered at 2013-03-07 08:54:34	2016-12-14 17:33:25 - Re: qtVlm thread
	Viva Philippe. Haha, thank you for this good tip (“TWS correction”). This was precisely what I needed. BH João/psail Sail Fair.
Posted by DirtyRat1402 Posts 4 Registered at 2015-07-01 09:40:49	2016-12-16 06:13:02 - Grib2 Variables: PRES loads but PRMSL does not
	I've directly downloaded some grib2 files from the NOMADS server which include pressure. One uses PRES variable and the other uses PRMSL. Only the PRES one will render the pressure information. I'd prefer to use the PRMSL version if we can get it to work. I've attached the PRMSL grib file for testing. Attachments GFS_NOAA_PRMSL_2016121600_1.grb2 (80.0 KB)

Page: First Previous 6 7 8 9 10 11 12 Next Last

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Auckland to Fiji 2023
Welcome to Auckland and, for the fifth time in Sailonline's history, an epic race to the Melanesian island of Fiji, some 1144nm away. The iconic Steinlager 2 has traditionally been our boat of choice for this event, including in 2020, the last time we raced the course – alone, unaccompanied by a real fleet as it had been #COVID19 quarantined. Alas, this year we will again be racing unaccompanied as low entry numbers has seen the real race cancelled. Hopefully, though, some of the real sailors from the Royal Akarana YC, hosts of the real event, will be joining us online to pit their skills against ours in the ever-changing forecast winds.
Race #1675
INFO by brainaid.de
Steinlager 2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SYC
Race starts: Jun 03rd 01:00 Registration Open!

▶ Flash

GO TO RACE

Susan Hood Trophy Race 2023

Lake Ontario Offshore Racing (LOOR) welcomes racers to the third virtual Susan Hood Trophy race. This is a 75nm weekender on western Lake Ontario starting and finishing at the Port Credit Yacht Club (PCYC) via Niagara and Burlington, and is one of two that will count towards a special Sailonline's LOOR Series medals. As our Beneteau First 36.7 managed the course so well in previous years, we shall race her again!
Race #1690
INFOby brainaid.de
First 36.7 PARTICULARS
NAM_AWIP WX Updates:
0245 / 0845 / 1445 / 2045
Ranking: SYC - LOOR
Race starts: Jun 03rd 00:00 Registration Open!

▶ Flash

GO TO RACE

SoCal 300 2023

Here, once again, is your chance to participate virtually in a second race of the California Race Week calendar, SDYC's challenging 243nm (as the seagull flies) SoCal 300 from Santa Barbara to San Diego. With a broad range of boats entered in the real race, virtual SOLers will have to dig deep to remain competitive in our trusty Santa Cruz 52s.
Race #1674
INFO by brainaid.de
Santa Cruz 52 PARTICULARS
NAM_AWIP WX Updates:
0245 / 0845 / 1445 / 2045
Ranking: SYC
Race starts: Jun 01st 20:00 Registration Open!

▶ Flash

GO TO RACE

Cape Town to Auckland 2023
Welcome to this second RTW race 2023. It's also the June edition of this year's ocean race championship. The course is slightly different from the one sailed in 2020, which then also was part of the RTW series.
This time we will race in the IMOCA 60 foil, as in all RTW races this year. That should guarantee the fun in the South Seas in a truly tough race.
PRIZE: SMPF
Race# 1685
INFO from brainaid.de
IMOCA 60 foil Particulars
WX updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - OCCH - RTW - SUPSOL - SYC
Race starts: Jun 01st 09:00 Registration Open!

▶ Flash

GO TO RACE

CA 500 2023

To celebrate the 50th anniversary of the TransPac Ocean Race in 2019, the organisers of the California Race Week introduced a new longer distance event for line-honours machines. Popular with the largest maxi trimarans, this CA 500, 500nm from San Francisco to San Diego, repeats in 2023, and if you don’t own a maxi trimaran, Sailonline are delighted to have the honour to, for the first time, make their virtual version available to you for a quick ethereal dash down America’s west coast.
Race #1687
INFO by brainaid.de
Maxi Tri PARTICULARS
NAM_AWIP WX Updates:
0245 / 0845 / 1445 / 2045
Ranking: SYC
RACE CLOSE: Saturday,
June 3 at 2300 UTC.
Race starts: May 26th 18:00 Registration Open!

▶ Flash

GO TO RACE

Lisbon to Cape Town 2023
Our second OCC race in Q2 is also our first race of a special
6-race RTW series, in IMOCA 60 Foilers, from the board of ita10267. Long bluewater legs, with the shores of the World's continents the only restriction on where you may sail, starting with a 5000nm leg from Lisbon to Cape Town. Enjoy!
PRIZE: SMPF
Race #1683
INFOby brainaid.de
IMOCA 60 foil Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - OCCH - RTW - SUPSOL - SYC
RACE CLOSE: Thursday,
June 1 at 2300 UTC.
Race starts: May 03rd 09:00 Registration Closed

▶ Flash

GO TO RACE

Go to race archive

SYC Ranking

View full list

Series

Mobile Client

SYC members have the benefit of access to our mobile/lightweight web client!

The mobile client