nmc2 ETA 104 data feed problems

To: address@hidden

We are having real problems with ftp access to the OSO server (both
140.90.88.142 and 140.90.6.103) which is hindering our MM5 real-time
modeling efforts.  Our secondary data acquisition method through the
CONDUIT system (NMC2 ldm data feed) is experiencing problems as well.
I think these problems are related.  

Here is a listing of the files that we received today, note how many
of the files are below 8,000,000 bytes (pretty much the minimum size
for these files after hour 00).
/home/disk/data/nmc2/ncep/erl/eta104.000922:
-rw-rw-r--   1 ldm       7957730 Sep 22 07:14 eta.T12Z.GRBGRD00.tm00
-rw-rw-r--   1 ldm       8293198 Sep 22 07:08 eta.T12Z.GRBGRD03.tm00
-rw-rw-r--   1 ldm       8235300 Sep 22 07:51 eta.T12Z.GRBGRD06.tm00
-rw-rw-r--   1 ldm       8256374 Sep 22 07:48 eta.T12Z.GRBGRD09.tm00
-rw-rw-r--   1 ldm       8252878 Sep 22 07:22 eta.T12Z.GRBGRD12.tm00
-rw-rw-r--   1 ldm       8242298 Sep 22 07:20 eta.T12Z.GRBGRD15.tm00
-rw-rw-r--   1 ldm       8258122 Sep 22 07:46 eta.T12Z.GRBGRD18.tm00
-rw-rw-r--   1 ldm       8212516 Sep 22 08:51 eta.T12Z.GRBGRD21.tm00
-rw-rw-r--   1 ldm       8237084 Sep 22 07:49 eta.T12Z.GRBGRD24.tm00
-rw-rw-r--   1 ldm       7859130 Sep 22 09:03 eta.T12Z.GRBGRD27.tm00
-rw-rw-r--   1 ldm       8235360 Sep 22 08:53 eta.T12Z.GRBGRD30.tm00
-rw-rw-r--   1 ldm       8237120 Sep 22 08:43 eta.T12Z.GRBGRD33.tm00
-rw-rw-r--   1 ldm       8209066 Sep 22 08:57 eta.T12Z.GRBGRD36.tm00
-rw-rw-r--   1 ldm       7353726 Sep 22 09:04 eta.T12Z.GRBGRD39.tm00
-rw-rw-r--   1 ldm       7353748 Sep 22 09:00 eta.T12Z.GRBGRD42.tm00
-rw-rw-r--   1 ldm       7350280 Sep 22 08:56 eta.T12Z.GRBGRD45.tm00
-rw-rw-r--   1 ldm       8184490 Sep 22 09:01 eta.T12Z.GRBGRD48.tm00
-rw-rw-r--   1 ldm       8191434 Sep 22 08:48 eta.T12Z.GRBGRD51.tm00
-rw-rw-r--   1 ldm       7376554 Sep 22 09:08 eta.T12Z.GRBGRD54.tm00
-rw-rw-r--   1 ldm       5808454 Sep 22 09:15 eta.T12Z.GRBGRD57.tm00
-rw-rw-r--   1 ldm       5794448 Sep 22 09:18 eta.T12Z.GRBGRD60.tm00

The hours that never fully arrived are 27,39,42,45,54,57,and 60.  

I have just contacted Tech Support at OSO, specifically Donald Turk at 
301-713-0902 (the phone number listed on the anonymous ftp site).  He
is still not convinced that there is a problem, but the data retrieval
has never been this slow via ftp and the NMC2 feed has not been this
incomplete for quite some time.

If you folks could look into the NMC2 data problem, this would be
helpful and may end up fixing both problems.

Thank you for any help that you can provide.

David Ovens

P.S. Here is some of the information that I forwarded to Donald Turk:

> 
> Donald,
> 
> We are having real problems retrieving the ETA 104 grids from
> 140.90.6.103 and 140.90.88.142 (files such as
> /ncep/erl/eta.000922/eta.T12Z.GRBGRD27.tm00).  For the 12Z cycle on
> the 20th, we had retrieved all grids from hour 00 to 60 within 34
> minutes, currently each file is taking about 15 minutes or more.  I
> have confirmed this slow download on both damp.atmos.washington.edu
> and orca.rsmas.miami.edu -- so the delay seems to be inside the 140.90
> domain.
> 
> Our traceroute to 140.90.6.103 seems to timeout before making
> all the way to that machine.  It gets as far as 140.90.149.12 before
> it runs into trouble.
> 
> Here is when I first started to notice the slowdown:
> Thu Sep 21 13:50:13 PDT 2000
> 
> 104 stoves,wx@damp% uname -a
> SunOS damp.atmos.washington.edu 5.6 Generic_105181-17 sun4u sparc
> 106 stoves,wx@damp% traceroute 140.90.6.103
> traceroute to 140.90.6.103 (140.90.6.103), 30 hops max, 40 byte packets
>  1  hoover.cac.washington.edu (128.95.176.100)  1 ms  1 ms  1 ms
>  2  uwbr2-GE1-0.cac.washington.edu (140.142.150.24)  1 ms  1 ms  1 ms
>  3  westingpop5-FE1-0.pnw-gigapop.net (198.32.170.3)  1 ms  1 ms  1 ms
>  4  157.130.181.241 (157.130.181.241)  1 ms  7 ms  1 ms
>  5  107.ATM2-0.XR1.SEA1.ALTER.NET (146.188.201.34)  2 ms  2 ms  1 ms
>  6  195.at-2-1-0.TR1.POR3.ALTER.NET (152.63.105.6)  5 ms  5 ms  6 ms
>  7  130.at-5-1-0.TR1.DCA6.ALTER.NET (152.63.2.137)  91 ms  91 ms  91 ms
>  8  287.at-5-0-0.XR1.TCO1.ALTER.NET (152.63.34.21)  93 ms  93 ms  93 ms
>  9  193.ATM6-0.GW3.TCO1.ALTER.NET (146.188.161.113)  94 ms  94 ms  94 ms
> 10  noaa-gw.customer.ALTER.NET (157.130.35.222)  98 ms  96 ms  99 ms
> 11  140.90.146.2 (140.90.146.2)  100 ms  100 ms  102 ms
> 12  140.90.149.12 (140.90.149.12)  103 ms *  113 ms
> 13  * * *
 
 
-- 
 
David Ovens             e-mail: address@hidden
(206) 685-8108          plan: Real-time MM5 forecasting for Pacific Northwest
Research Meteorologist
Dept of Atmospheric Sciences, Box 351640
University of Washington 
Seattle, WA  98195