VP2: discordances from GW and Weather Link

[Andrea75]

Hi, I have tried to use GW, that I'm using without any problem with a WS2300, with a Davis Vantage Pro2, with vantagepro.dll plugin.
But I have a lot of discordances from original data, recorded on Weather Link files, and those generated from Graph Weather. For example I post the two NOAA output files:

The NOAA generated from GW:

Code : Tout sélectionner

       MONTHLY CLIMATOLOGICAL SUMMARY for August 06

NAME:    CITY:    STATE:
ELEV:     0 m  LAT:   0° 00' 00" N  LONG:   0° 00' 00" W

                   TEMPERATURE (°C), RAIN  (mm), WIND SPEED  (km/h)

                                      HEAT   COOL        AVG
    MEAN                              DEG    DEG         WIND                 DOM
DAY TEMP  HIGH   TIME   LOW    TIME   DAYS   DAYS  RAIN  SPEED HIGH   TIME    DIR
------------------------------------------------------------------------------------
01  27.4  34.1   15:30  20.3   06:00   0.0    9.0   0.0   3.3  11.3   16:30     S
02  27.4  33.5   15:20  23.3   05:50   0.0    9.0   0.0   2.7   8.0   15:00     S
03  24.3  30.7   14:50 -17.8   00:00   0.1    6.3   0.0   4.1  12.9   14:50     S
04  24.3  30.9   15:50  18.8   06:30   0.0    6.0   0.0   4.5  16.1   20:20    SW
05  22.0  30.3   15:50  13.8   06:40   0.6    4.4   0.0   3.4  19.3   19:30    NE
06  21.8  31.2   17:10  13.8   06:50   0.9    4.4   0.0   1.8   9.7   17:50    NW
07  22.6  29.8   14:30  15.8   06:50   0.3    4.7   0.0   2.0   8.0   11:30    SE
08  21.0  30.8   14:50  16.1   06:30   0.6    3.3  22.8   2.8  12.9   16:40     E
09  18.9  28.9   13:50  15.0   06:00   0.9    1.5   7.0   1.2  12.9   14:40   NNE
10  21.2  28.3   16:30  14.2   06:30   1.1    3.9   0.0   3.1   9.7   12:20    NE
11  21.5  26.7   16:30  15.3   06:30   0.3    3.5   0.2   2.6   9.7   12:50    SE
12  22.3  26.4   12:20  20.2   06:20   0.0    4.0   0.0   4.3  11.3   14:50   SSE
13  20.2  24.7   16:40  16.4   04:40   0.2    2.1   0.6   1.4   6.4   10:50     E
14  21.5  27.2   15:30  18.1   02:20   0.0    3.2   0.0   3.0   8.0   16:00    SE
15  22.7  28.9   16:30  18.4   07:00   0.0    4.4   0.0   1.8   6.4   12:40     W
16  24.0  31.8   15:10  16.7   06:00   0.2    5.9   0.0   3.1  11.3   16:40   ESE
17  25.5  31.0   15:10  19.9   06:30   0.0    7.1   0.0   2.3   8.0   13:00   SSE
18  25.6  31.7   16:00  19.9   06:10   0.0    7.3   6.2   2.7  11.3   07:30   WSW
19  25.3  36.6   15:00  18.6   06:00   0.0    5.5   0.0   1.3  11.3   15:20   ENE
20  28.2  35.3   15:40  22.2   06:40   0.0    9.9   0.2   2.8  19.3   22:40    SW
21  25.8  31.7   17:20  20.1   06:40   0.0    7.5   1.6   3.0  12.9   00:10   NNW
22  23.5  31.3   16:30  15.6   06:20   0.3    5.5   0.0   1.9   8.0   18:20   WSW
23  23.5  31.0   15:20  16.7   07:10   0.1    5.3   0.0   1.9   8.0   17:50   SSW
24  23.2  28.9   14:00  18.2   06:20   0.0    4.9   0.0   1.3   8.0   14:10    SW
25  22.2  26.8   17:10  17.9   23:20   0.0    3.9   5.6   2.8   9.7   13:50   ESE
26  20.7  27.8   15:20  13.3   07:00   1.1    3.5   0.0   1.7   8.0   16:20   SSE
27  21.0  28.4   16:30  15.8   05:50   0.3    3.0   4.4   1.7   9.7   12:30   NNE
28  20.5  28.4   16:20  13.5   06:50   1.0    3.2   0.0   1.9   8.0   16:10   SSW
29  22.1  27.4   15:30  18.2   02:40   0.0    3.7   0.0   1.8   6.4   14:50   ESE
30  19.8  23.3   16:50  15.4   09:30   0.2    1.8   6.6   5.6  17.7   09:20   NNE
31  18.7  27.9   17:10   9.2   07:10   2.6    3.0   0.0   1.8   6.4   13:10   NNE
-------------------------------------------------------------------------------------
    22.8  36.6    19   -17.8     3    11.0 150.4  55.2   2.6  19.3     5      SE

Max >=   32.0:  4
Max <=    0.0:  0
Min <=    0.0:  1
Min <=  -18.0:  0
Max Rain: 22.80 ON 08/08/06
Days of Rain: 8 (> .2 mm) 6 (> 2 mm) 1 (> 20 mm)
Heat Base:  18.3  Cool Base:  18.3  Method: Integration 

And this is the original NOAA generated from Weather Link:

Code : Tout sélectionner

                   MONTHLY CLIMATOLOGICAL SUMMARY for AUG. 2006

NAME: Davis VPro 2   CITY: Terni   STATE: Italy
ELEV:   265 m  LAT:  42° 35' 54" N  LONG:  12° 36' 24" E

                   TEMPERATURE (°C), RAIN  (mm), WIND SPEED (km/hr)

                                      HEAT  COOL        AVG
    MEAN                              DEG   DEG         WIND                 DOM
DAY TEMP  HIGH   TIME   LOW    TIME   DAYS  DAYS  RAIN  SPEED HIGH   TIME    DIR
------------------------------------------------------------------------------------
 1  27.4  34.3   15.30  20.3    6.00   0.0   9.1   0.0   3.2  22.5   16.00    SW
 2  27.3  33.6   15.20  23.3    6.00   0.0   9.1   0.0   2.7  20.9   17.30    SW
 3  24.3  31.0   14.20  19.9    6.50   0.0   9.7   0.0   3.4  30.6   15.00    SW
 4  24.3  31.1   16.00  18.8    6.30   0.0   6.0   0.0   4.5  35.4   20.20   WSW
 5  22.0  30.6   16.00  13.8    6.40   0.7   4.4   0.0   3.4  43.5   19.40   NNE
 6  21.8  31.2   17.10  13.8    6.50   0.9   4.4   0.0   1.8  22.5   17.50   NNE
 7  22.7  29.8   14.30  15.8    6.50   0.3   4.7   0.0   2.1  27.4   17.30   ENE
 8  20.9  31.0   15.00  16.1    6.30   0.6   3.3  22.8   2.7  29.0   16.40   ENE
 9  18.8  29.1   14.00  15.0    5.40   0.9   1.5   7.0   1.1  29.0   14.40    NE
10  21.2  28.3   16.30  14.2    6.30   1.1   4.0   0.0   3.1  25.7   16.40    NE
11  21.5  27.1   16.40  15.3    6.30   0.4   3.6   0.2   2.6  29.0   17.00   ENE
12  22.3  26.6   12.30  20.2    6.20   0.0   4.0   0.0   4.3  29.0   14.50   SSW
13  20.2  24.8   16.50  16.1    7.40   0.2   2.1   0.6   1.4  20.9   13.40    NE
14  21.4  27.2   15.30  18.1    2.20   0.0   3.2   0.0   3.1  20.9   15.20    SW
15  22.7  28.9   16.30  18.4    7.00   0.0   4.4   0.0   1.8  22.5   14.50    NE
16  24.0  31.9   15.20  16.7    6.10   0.2   5.9   0.0   3.2  27.4   14.30   ENE
17  25.4  31.1   15.10  19.9    6.30   0.0   7.2   0.0   2.3  20.9   15.50   ENE
18  25.6  31.7   14.30  19.9    6.10   0.0   7.3   6.2   2.7  27.4    7.20   WSW
19  25.4  36.7   15.00  18.5    6.10   0.0   5.6   0.0   1.3  22.5   15.00    NE
20  28.2  35.5   15.40  22.2    6.40   0.0   9.9   0.2   2.9  38.6   22.40    SW
21  25.8  31.7   17.00  20.1    6.40   0.0   7.5   1.6   2.9  33.8    3.10   WSW
22  23.5  31.4   16.30  15.6    6.20   0.3   5.6   0.0   1.9  22.5   18.30   NNE
23  23.4  31.3   16.30  16.7    7.10   0.1   5.3   0.0   1.9  19.3   16.40    NE
24  23.2  28.9   14.10  18.2    6.20   0.0   4.9   0.0   1.3  17.7   14.10   WSW
25  22.2  26.8   17.10  17.7   00.00   0.0   3.9   5.6   2.7  25.7   13.50    NE
26  20.7  27.9   15.20  13.3    7.00   1.1   3.5   0.0   1.8  25.7   16.20    NE
27  21.0  28.4   16.30  15.7    6.10   0.3   3.0   4.4   1.6  24.1   11.50    NE
28  20.4  28.6   16.30  13.5    6.50   1.0   3.2   0.0   1.9  22.5   17.50    SW
29  22.1  27.7   14.50  17.9    2.50   0.0   3.7   0.0   1.8  19.3   15.50     E
30  19.8  23.3   16.50  15.4    9.30   0.2   1.8   6.6   5.6  41.8   13.50   NNE
31  18.7  27.9   17.10   9.2    7.10   2.6   3.0   0.0   1.8  19.3   13.50    NE
-------------------------------------------------------------------------------------
    22.8  36.7    19     9.2    31    11.0 154.5  55.2   2.5  43.5     5      SW 

As you can see there are a lot of differences between the 2 outputs. It is possible to have a solution?

[TiToine]

Hi,

Thanks for the report, I will try to fix this issue in the next release.

Antoine.

[Andrea75]

The problem is not solved with 2.0.275b.... You could try with my file. The version of Weather Link in use is 5.7.

2006-08.zip

[TiToine]

Hi,

The problem for max wind speed and direction is a bit complicated to solve. Many data is provided in the wlk file, but GW doest not use the whole data.
You have to live with this limitation, sorry.

[Andrea75]

Hi,

The problem for max wind speed and direction is a bit complicated to solve. Many data is provided in the wlk file, but GW doest not use the whole data.
You have to live with this limitation, sorry.

So there is not another better way to use a Vantage Pro2 and GW?

[TiToine]

No. If you want accuracy stats you have to use Weather Link. For graphs, no problem for using GW.

[andro]

This also occurs with Weather Display. I use the log txt files from Weather Display. The average winds are usually within .1 mph which is just calculation difference. Where I see the problem is the Max Gust and Wind Direction. Just thought I would comment on this since I use a different source to get the data from.

Chuck