K. Venkateswara

I revived the BRS system after a crash towards the end of last week. It had successfully worked for a period of 16-17 days since the last restart.

As described in SEI alog 638, I've modified the pendulum response-inversion filter. I've also modified the tilt-subtraction scheme as described in the subsequent comments to the log. A high-pass filter at 5 mHz has been added in the sensor correction path (in the calibration filter bank) to roll off the low frequency increase in noise.

I've attached a pdf showing the output of the new tilt-subtraction scheme. The red 'super-sensor' curve looks similar to the blue ground curve, so we'll have to wait for a windy period to see if the tilt-subtraction has been improved or not.