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	ACE ISS PRODUCT LOG

Prepared by: Steve Cohn

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ACE - NOAA DISCOVERER:  (ISS1) 
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Data summary 11/20 02Z through 11/21 03Z

GENERAL: Calmer seas; SCS sometimes broken. This is hard to determine
from the transferred data. The surface and profiler wind speed/direction
will be wrong during these outages.

SURFACE DATA: Good T, RH, P, gauge. Cannot evaluate wind speed/dir measurement.

Temperature: very steady, 6-10 C (overcast)
Winds: change between two modes, which could be caused by the ship altering
       speed (stopped for a CTD?) or by the intermittant SCS speed/course
       correction.

SOUNDING - PROFILER COMPARISON:

RASS generally parallel to and slightly warmer than sonde, consistent
with virtual temperature

Profiler wind directions when "good" is often about 20 degrees
too small (rotated counter-clockwise)

(note direction of errors assume class is correct and refer to radar data)

11/20 06Z (0459): Low mode: poor below 700m, above within 15 deg, 0-3 m/s high
		  High mode: same as Low
11/20 12Z (1052): Low mode: speed always hi 3-10 m/s, dir within 50 deg
		  High mode: same as low
11/20 18Z (1706): Low mode: speed fair agreement, direction off by 150 deg
		  High mode: speed low by 4 m/s, direction way off
11/21 00Z (2300): Low mode: above 800m dir within 30 deg, speed 2-5 m/s low
		  High mode: diretion within 20 deg, speed about 3 m/s hi

PROFILER DATA:

Winds may be severly effected by the large swells if the stable platform
does not keep up.

Winds will be wrong during periods when the SCS-based correction for ship's
motion fails.

Low mode: typically to 1.5 to 1.8 km. Character of data changes abruptly,
perhaps indicating an SCS or platform problem.

High mode: typically to 2.2 to 3.0 km.Character of data changes abruptly,
perhaps indicating an SCS or platform problem.

RASS: profiles generally to 600-1100 m. Good coverage, has the relative
      wind slowed?

SOUNDING COMMENTS:

NOTE: Several soundings have questionable winds below 700m. This may be
caused by using an unrealistic surface wind point when the SCS correction
fails.

NOTE: A few sounding have oscillations in u,v

11/20 06Z (0459): good flt; check winds below 700 m biased; inversion 1.3 km
11/20 12Z (1052): good flt; jump in wind at 2 km; inversion 1.3 km
11/20 18Z (1706): good flt; check winds below 700 m biased; inversion 1.5 km
11/21 00Z (2300): good flt; inversion 1.5 km

SITE LOG INFORMATION: 

Some problems with SCS data persist.

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ACE - CAPE GRIMM:  (ISS4) 
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Data summary 11/21 02Z through 11/21 14Z

GENERAL: Current status: Profiler/RASS inop; Radiosondes working; Sfc
			 thermo/gauge/rad working, sfc speed/direction inop

SURFACE DATA:

Sensors look good except anemometer.
Wind speed:  reading 0 m/s; direction may be ok.
RH: good except for sudden unrealistic drying for about 45 min (12-13Z 11/21)

SOUNDING - PROFILER WIND COMPARISON:

No profiler winds or temperatures available

PROFILER DATA:

Profiler still inoperative. Replacement parts on the way.

SOUNDING COMMENTS:

11/21 06Z (????): file not avaliable (not transferred?)
11/21 12Z (1130): good flight; T, Td good; winds in&out 500-3000m, else good.

SITE LOG INFORMATION: (summary of relevant TKLOG entries)

Profiler problem being worked on - replacement parts on the way.
Surface prop/vane problem being worked on.
Continued games of hide-and-seek with Omega lock; usually wins.

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NOAA DISCOVERER ISS SITE LOG -- Julian Day 324
##############  NOAA DISCOVERER  ################
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total class ------- 11/20/1995 -- 4/4
total prof915l ---- 11/20/1995 - 48/48
total prof915h ---- 11/20/1995 - 48/48
total rass915 ----- 11/20/1995 - 48/48
total surface_met - 11/20/1995 -- 2/2
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CAPE GRIMM ISS SITE LOG -- Julian Day 324
###############  CAPE GRIMM  #################
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total class ------- 11/20/1995 -- 4/4
total prof915l ---- 11/20/1995 - 0/48
total prof915h ---- 11/20/1995 - 0/48
total rass915 ----- 11/20/1995 - 0/48
total surface_met - 11/20/1995 -- 1/2
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