Two articles that you would likely be interested in, as they have similar motivations to yours:
Limits of Predictability in Human Mobility
by: Chaoming Song, Zehui Qu, Nicholas Blumm, Albert-László Barabási.
Science, Vol. 327, No. 5968. (19 February 2010), pp. 1018-1021.
Understanding individual human mobility patterns
by: Marta C. Gonzalez, Cesar A. Hidalgo, Albert-Laszlo Barabasi.
Nature, Vol. 453, No. 7196. (05 June 2008), pp. 779-782.
Note the two studies use the same data, which is similar to yours but not at the level of precision in space or time. I don't think what I would describe what you want to find as a trajectory, but I'm not sure what I would call it either. Why exactly do you want to cluster the beginning/end nodes of your "trajectories".
On the site for the product it says the following under the GPS Performance section:
- Go to the link above ------> Hit the "support tab" ---------> and the hit "GPS performance" (for some reason, my link doesn't lead directly to the page I was on)
Here's a copy/paste of what it says in that section:
How accurate is MobileMapper CX?
MobileMapper CX provides real-time, sub-meter accuracy through DGPS corrections. The optional MobileMapper Beacon receiver provides beacon corrections to MobileMapper CX via Bluetooth technology.
Note: Sub-meter performance is subject to satellite and environmental conditions. See the MobileMapper CX datasheet for details.
Can I post-process MobileMapper CX data?
Yes. Some data logging applications running on MobileMapper CX record GPS measurements that can be post-processed by MobileMapper Office.
How do I set up the MobileMapper CX for real-time differential correction using SBAS (WAAS/EGNOS/MSAS) signals?
Run the DGPS Configuration program (tap Start>Programs>GPS Utilities>DPGS Configuration > Select Mode > SBAS and tap OK. With the receiver set to None (autonomous mode), Beacon (MobileMapper Beacon) or Other RTCM Source, the MobileMapper CX will not use SBAS corrections even if it receives them.
Where do I have to be in order to use SBAS corrections?
You should use SBAS signals only if you are in North America or the Northern Pacific (WAAS), Europe (EGNOS) or Japan (MSAS). Although you may pick up SBAS signals outside of these areas, the corrections are calculated using ground stations only in these areas. The farther away from these areas your receiver is, the more error you may be introducing to your position calculations.
This information should be in your maunual .... no??
There's also information on integrating with arcpad at this link
Best Answer
I think your best chance will be to track yourself. If the idea bothers you, that's the reason why you won't find such data public anywhere.