Table 1.
Portable GPS data loggers tested in this study.
| Company | Chip/channels | Motion detection | Memory (points/days at 5 second interval) | Claimed/(tested battery life 1, 2)a(hours) | Claimed accuracy | WAASbsupport | Weight (gram) | Bluetooth | Pricec(US$) | |
|---|---|---|---|---|---|---|---|---|---|---|
| GPS data loggers | ||||||||||
| WBT-201 | Wintec | u-Nav + iTrax, 16 channels | No | 131,072/7.6 | 15/(19, 18) | 3 m | Yes | 48 | Yes | 94 |
| DG-100 | GlobalSat | SiRF starIII, 20 channels | No | 60,000/3.5 | 20/(17, NA) | 5 m | Yes | 227 | No | 70 |
| BT-335 | GlobalSat | SiRF starIII, 20 channels | No | 60,000/3.5 | 25/(22, 24) | 5 m | Yes | 75 | Yes | 63 |
| VGPS-900 | Visiontac | MTK II, 51 channels | No | SD cardd | 24/(18, NA) | 1.5 m | Yes | 55 | Yes | 95 |
| BT-Q1000X | Qstarz | MTK, 51 channel | Yes | 200,000/11.6 | 42/(48, 45) | 2.5 m | Yes | 65 | Yes | 95 |
| GPS receiver or embedded GPS module with cell phones | ||||||||||
| GPhone | HTC (android system) | Not known | Yes | SD cardd | NA/(9, NA) | NA | No | 128 | Yes | 99e |
| E71 cell phone | Nokiaf | Not known | No | SD cardd | NA/(21, NA) | NA | No | 126 | Yes | 345 |
Notes:
a
Tested battery life 1 and 2 were obtained with the device outputting at 5- and 60-second interval, respectively; NA for battery life means no claimed battery life or tests were conducted;
b
WAAS: Wide Area Augmentation System which can provide higher spatial precision based on GPS satellites and ground based stations;
c
Price: All the prices based on www.amazon.com on July 22, 2010 except GPhone;
d
Points/days vary based on SD card size;
e
This is the price with Sprint month service fee of $69.99;
f
Logger software from CENS at the University of California, Los Angeles. E71 was not registered in the cell phone network.