I would be very unhappy with a bill at 2x the estimate also.

All in all we estimate that the photographs could NOT have been taken LATER THAN 2005! At least 5 years old and possibly 6 years old. Upgraded (resolution) but NOT updated. The implications of this for marine use are obvious. Take care out there.

When I look at the current ripples coming off the floating ATONS, my estimation is that the current is only around .5 knots, and our experience motoring into it suggests the same. But, sitting here with nothing to do, my mind wondered over to a more scientific approach.

That means more than 2 days for my estimated 7500 steps animation. Considering the inclusion of all the components in the animation maybe a week will not be enough.

However, because of the algorithms I try to apply at the receiver (packet/symbol synchronization, channel estimation, carrier-frequency offset cancellation, detection) I have to deal with a lot of delay at the receiver processing part. As a result, my transmitter keeps sending packets which will either get lost or stored at the fifo.

Can somebody from Ettus verify these estimates or provide more accurate ones? It is really too bad (for me) that these levels appear to be below 0dBm, because minicircuits make limiters that output no more than 0dBm, but they don't make ones for lower powers. Perhaps a good solution is a 0dBm limiter followed by a 10dB attenuator? Thanks, Sivan

Does anybody have an estimate on the effort required? It looks like a trivial change (push samples from here to there) but since I am not an FPGA programmer I might easily overlook troubles ahead. Thanks, Claudio -- Claudio Cicconetti, PhD Software Engineer - MBI S.r.l. - Pisa, Italy http://about.me/ccicconetti

I haven't made accurate measurements, but I would estimate the room temp is changing about 4 deg C over the period. Maximum inflections on the efc graph seem to be around 4 AM and mins at around 5-6 PM. This makes sense for min/max ambient temperatures. EFC values seem to be changing about 20 steps over this cycle.

The ThunderBolt DAC voltage plot mirrors the PPS error estimate. As one goes up, the other goes down. They show discontinuities whenever the tracked satellite constellation changes. The DAC voltage usually wanders +/- 250 microvolts over an hour. The PPS error plot is generally a smooth curve.

The good Lady Heather's GPS Disciplined Oscillator Controller Program calculates and plots (also writes the results to the log file) ADEV and OADEV of the Thunderbolt's reported error estimates. My comparison of these "auto-ADEVs" to the values generated from a Tek DC5010 counter showed they agreed within a factor of two.