Poor weather allowed us to gather a regular CW run on 13 Feb :

    Datasets El Dirn     HST     mean leg temperatures   Humidity
                        start      start   middle   end       %
  ( 20020125 90 cw       06:05     -0.8     -0.5   -0.3      65 
    20020208 90 cw       22:55     -3.5     -3.5   -3.4      90 )
    20020213 90 cw       00:00     -0.2      0.0    0.1      80

• The new data at are again of full amplitude - i.e. showing no sign of the 'small-amplitude' syndrome captured on 17 Oct.

• The difference between the model resulting from the new data and those from 08 Feb is shown below :
  

• The temperature of the inclinometer in the cabin (Ch3) was not properly measured - see plot. I substituted the constant value 100mV throughout.

• The model difference data show spikes in Ch5 (LY & F1) at az=211, 289 and in Ch2 (TY & F3) at az=86, 149. These were removed before the model was installed. The spikes in F1 at az=66, 146 were in the data of 08 Feb.

• The formal differences in (F1,F2,F3) between these data are described by the rms scatters of (0.94", 0.25", 0.59") c.f. (1.08", 0.48", 0.63") previously. This larger-than-normal difference (in F1) - as seen last time - is due to a strong reversal to the F1 form seen on 25 Jan.

• The new model was installed at 15:15 HST 13 Feb 2002.

• The data were also analysed for symmetry properties -- the time line shows all is OK.

• . . . and the Strain Gauge measures are added to the record - all seems OK.