Tras purchase of Ashtech by Trimble, Spectra has started promoting Mobile Mapper products. The simplest of these is the Mobile Mapper 10, which I want to take a look at this time.
The Mobile Mapper Pro, CE and CX versions ended there although the latter is still on the market; From Blade technology was launched the known Mobile Mapper 6, which is the ancestor of this that we are now presenting. The line is different, because a MM6 despite having new technology in terms of operating system, does not surpass the Mobile Mapper Pro in terms of receptivity, that was a very fine receiver with the ability to read the C / A code and the carrier phase. It brought standard post-processing and its final cost with good haggling was for 1,200 dollars with post-processing. While still the MM10 only reads the C / A code and with technology (software level, not reception) manages to reach the 50 post-processing cms; whenever you have activated the postprocess, but this option costs 500 additional dollars, that is, it comes to you as in 1,900.
How the Mobile Mapper 10 differs from the Mobile Mapper 6
In general, the differences are significant. In terms of design, the MM10 is taller, wider, but also narrower; with better distribution of space; We never knew why the roasting on the top. At the ends it has rubber protuberances that make it easier to handle with one hand.
The lower box shows in green the aspects that give the Mobile Mapper 10 greater potentialities with respect to the MM6 and those marked in red are the negative differences that are inevitable in the face of the change. I am also placing a column to show what happens with the Mobile Mapper 100, Of which I spoke earlier.
|Mobile Mapper 6||Mobile Mapper 10||Mobile Mapper 100|
|Constellations||GPS, SBAS||GPS||GPS, GLONASS, SBAS|
|Actualización||1 Hz||1 Hz||0.05 seconds|
|Data format||NMEA||NMEA||RTCM 3.1, ATOM, CMR (+), NMEA|
|It can function as a base||No.||No.||Si|
|SBAS mode real-time precision||1 - 2 mts.||1 - 2 mts.||less than 50 cm .. in SBAS, less than 30 cm. in DGPS.|
|Post-process accuracy||Less than one meter||Less than 50 centimeters||1 centimetres.|
|Processor||400 Mhz||600 Mhz||806 MHz|
|Operating System||Windows Mobile 6.1||Windows Mobile 6.5||Windows Mobile 6.5|
|Communication||Bluetooth, USB||Bluetooth, USB, GSM / GPRS, Wifi||GSM / GPRS, BT, WLAN|
|Size||14.6 x 6.4 x 2.9 cm||16.9 x 8.8 x 2.5 cm||19 x 9 x 4.33 cm|
|Weight||224 grams||380 grams with battery||648 grams|
|Screen||2.7 "||3.5 "||3.5 "|
|Memory||64MB SDRAM, 128 MB Flash, SD memory||128 MB SDRAM, 256 MB NAND, Micro SDHC Memory up to 8GB||256 MB SDRAM / 2 GB NAND, Micro SDHC|
|Minimum temperature||-20 C||-10 C||-20 C|
|Maximum temperature||+ 60 C||+ 60 C||+ 60 C|
|Drop support and vibrations||1 meters||1.20 meters on concrete||1.20 meters on the concrete, more standards ETS300 019 & MIL-STD-810|
|Battery||One Pair AA||Lithium / duration up to 20 hours||Lithium / duration up to 8 hours|
|Type of Antenna||Internal / External||Internal / External||Internal / External|
A substantial improvement is in the battery, instead of the AA pair it brings a Lithium battery with autonomy of up to 20 hours; nothing bad because there are almost three days of work in days of 7 hours. This surely helped him to be narrower.
It does not improve in accuracy without post-processing, it is almost a navigator with radial precisions below 2 meters. It is necessary to understand that it is a team of only one frequency, it does not support RTK. But it does improve with respect to the MM6 in the accuracy of data after the processing, which can be below the 50 cm, equivalent to the pixel of a conventional orthophoto in a rural survey.
This precision is assumed because it has a range of up to 20 channels (GPS L1 C / A and in SBAS mode: WAAS / EGNOS / MSAS). Additionally it is understood that it could be done post-processing with respect to a remote base through GPRS or Wifi.
It brings a newer version of Windows Mobile, the processor is improved (It's an ARM9) but at the software level it brings the same thing: Windows Mobile. Active Sync and Internet Explorer. Mobile Mapper Field is included, which is similar to Mobile Mapping with some improvements; however, it also supports ArcPad although this license can only be purchased in the United States.
Also the memory has greater capacity, it brings up 256 MB NAND (non-volatile Flash), even now it supports MicroSD even of 8 GB.
As extras you can buy an external antenna and the racket to hang it on a cane. To activate the post-processing option, an activation key must be paid.
For its price, it goes down the US $ 1,500 does not look bad. Although in my opinion is just a Pocket with GPS and GIS capabilities.
It is ideal for rural cadastre, forestry, environmental projects or those where 50 centimeters of precision is enough. Obviously, we must take advantage of the GIS, because it allows you to build layers of lines, polygons or points with the amount of attributes that we want, including photographs and audio.
We would have to see what happens if we use gvSIG Mobile to find something more than the simple Mobile Mapper Field.
What sets it apart from the Mobile Mapper 100
Of course the Mobile Mapper 10 is a toy when it is copied with the Mobile Mapper 100. That's another level of instrument with post-processing accuracies of up to 1 cm, although it's still a frequency.
Perhaps the biggest disadvantage of MM10 is that it is not scalable, it gets there for the purposes it has been designed.
On the other hand, the Mobile Mapper 100 can be scaled. With an external antenna and some configurations it could become a Promark 100, with something more in a Promark 200 that already supports double frequency.
Although the carcass is the same on the outside.
That comparison we will see in another post.
Here you can find a representative of these products.
Here you can find out more Ashtech products.