1. My above statement that 2009 version somehow treats speed differently than earlier S&T versions may be completely incorrect. That was only my first impression upon seeing speed reading of 6 kmh while not in motion the other day, but I have to admit that I very seldom (almost never) pay any attention to the speed reading in GPS Task pane. I normally use S&T in full-screen mode, and thus I have no access to speed. I use the vehicle's own speedometer (as strange as this may sound ).
2. Terry is correct in saying that this incorrect speed issue is in many (most) cases a sensitivity issue. When a GPS receiver has access to stronger satellite signals, its accuracy is considerably better.
If anyone wishes to experiment with enabling SN (Static Navigation) in their SiRF based GPS receiver, here's how:
SiRF Demo application, when used improperly, may render your GPS receiver unusable. Use it at your own risk. Hundreds of people have killed their GPS units with SiRF Demo in the past, and hundreds of people will still kill their perfectly functional GPS receivers in the future. Some people will ruin their good GPS after reading this thread, and experimenting with various features of SiRF Demo.
I only describe steps needed to enable SN. If you wish to do anything else with the program, read the user manual before you click your mouse on anything.
To enable SN
1. Download and install SiRF Demo:
http://www.falcom.de/support/software-tools/sirf/
2. When you start SiRF Demo, you may be prompted to enter serial port and baud rate. Make the proper selection, and then click OK
3. If you were not prompted to enter port and baud rate, click Setup => Data Source, to access the dialog box
4. Click Action => Open Data Source
5. Click Action => Switch to SiRF Protocol
6. Click Navigation => Static Navigation => Enable (or Disable) => Send
7. Click Action => Switch to NMEA Protocol
8. Make sure the baud rate is set to the correct value for your GPS receiver, and then click Send
You are done.
Proceed at your own risk.