[ferret_users] Fwd: vertical cross section along a ship track

[aleksi.nummelin@xxxxxxxxxxxxxxx]

Hi,

Here is some more information (again) and answers for 
Jaison, hope it helps,
previos messages are on the bottom

Data format is NetCDF, and I havent used any grid.
Dimensions of variable V are shown below

yes? show data
     currently SET data sets:
    1> /domus/jlehtira/share/eco2004_06_4-12_UVW.cdf 
(default)
 name     title                             I 
              J          K              L
 TIMEAXIS                                  ... 
           ...         ...          1:544
       (invalid coordinate axis)
 U        Zonal Velocity            1:108     1:120 
   1:21      1:544
 V        Meridional Velocity   1:108     1:120     1:21 
    1:544
 W        Vertical Velocity        1:108     1:120 
   1:21      1:544
  
yes? show grid V
    GRID GJI2
 name       axis                    # pts      start 
                   end
 SXAXIS    LONGITUDE   108mr   8.699E(8.7)       30.1E
 SYAXIS    LATITUDE       120 r     53.849N 
           65.75N
 UZAXIS    DEPTH (m)      21 i-      0 
                        139.9
 TIMEAXIS  T                       544 r    1 
                        544

--- Begin Message ---

• To: ferret_users@xxxxxxxx
• Subject: vertical cross section along a ship track
• From: aleksi.nummelin@xxxxxxxxxxxxxxx
• Date: Mon, 28 May 2007 13:20:22 +0300

HI

Here is some more info about my problem (see my previous message on the bottom):

whole error message:

**ERROR: dimensions improperly specified: 9999999 words were requested. *** NOTE: Check for unspecified limits on an ABSTRACT axis

 *** NOTE: Use the SHOW GRID command to see the axes

I tried to specify abstract axis but obviously it didn't work . I can also plot the ship track,

so I guess the problem is not  track itself.

One of the tracks I tried to use:

yes? LET/QUIET xlon1 = 22
yes? LET/QUIET xlon2 = 24
yes? LET/QUIET xlon3 = 28
yes? LET/QUIET ylat1 = 59.5
yes? LET/QUIET ylat2 = 59.7
yes? LET/QUIET ylat3 = 60.2
yes? LET/QUIET XLEG1 = xlon1 + (L-1)*(xlon2-xlon1)
yes? LET/QUIET XLEG2 = xlon2 + (L-1)*(xlon3-xlon2)/3
yes? LET/QUIET YLEG1 = ylat1 + (L-1)*(xlon2-xlon1)
yes? LET/QUIET YLEG1 = ylat1 + (L-1)*(ylat2-ylat1)
yes? LET/QUIET YLEG2 = ylat2 + (L-1)*(ylat3-ylat2)/3
yes? LET/QUIET XTRACK = IF L LE 2 THEN XLEG1 ELSE XLEG2
yes? LET/QUIET YTRACK = IF L LE 2 THEN YLEG1 ELSE YLEG2

I thought the problem might be the variable L so I tried I and J and even A (wich was my own variable),

but none of them worked.

My PREVIOUS MESSAGE:

Hi!

I have tried to make a vertical profile along a ship track, but I get just this:

ERROR: dimensions improperly specified: 9999999 words were requested.

I have used script

LET slantV = samplexy(V,xtrack,ytrack)
FILL/LEVELS=(-1,1,0.1)/VLIMITS=0:100 slantV

V is variable (meridional velocity). According to users guide this should work,

and it does when I make a profile along a simple line,

so do you have any ideas what I'm doing wrong when trying to plot along a ship track?

Thanks (for previous answers too)!

 - ALEKSI NUMMELIN -

--- End Message ---