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System
Features
- 8-channel L1
frequency
- Full wavelength carrier phase on L1
- Carrier-phase smoothing
- Up to 1 Hz position update rate
- Up to 1 Hz code & phase measurements
- 1 PPS timing signal
- Superior performance under tree canopy
NMEA / Barcode Device Interface Capabilities
- Two 9-pin
RS-232 serial ports, PC/AT pinout.
- The MARCH has two waterproof DB-9 RS-232 serial ports (COM1: and COM2:) for
communication with your PC as well as a variety of additional input and
output devices such as:
RTCM-104 Version
2.0: Real-time DGPS
Simply plug your RTCM-104 source (i.e.FM pager, VHF radio, WADGPS) into the
MARCH's COM1: port. The MARCH will automatically detect and use the RTCM
message. Since the March has two DB-9 serial ports, you can use COM1: for
RTCM and still have COM2: available for a barcode reader or NMEA output to
another instrument. Don't worry if you lose the RTCM message while you are
collecting data; the MARCH-II-E can be set to collect raw data and will
automatically warn you so you can post-process your data.
Compatible with
Coast Guard Beacon Receiver
Obtain real-time
differential correction with CMT's Coast Guard Beacon
Receiver package.
NMEA 0183
output
The MARCH will
send out a NMEA 0183 message, at an interval specified by you, to either
COM1: or COM2:. This functionality allows the MARCH to output a GPS position
to devices (i.e. digital cameras, sonar, etc.) that will accept a NMEA 0183
message. There is no need to change your instrument settings. The MARCH
communications can be set to match your instrument. In the NMEA Setup screen,
you have complete control over the baud rate and protocol settings.
Efficient Data
Entry with Bar Code Input
Attach a bar code
scanner to the March and you can quickly enter data. Bar code menus can be
set up in such a way that you never need to touch the March keyboard.
Data Collector Features
- Waterproof
(submersible)
- Operating temperature: -20°C to 54°C
- Audible beeper
- 8 line x 21 character backlit display
- 2 MB RAM, 512K Flash EPROM
- 7.9" (20 cm) x 3.9" (9.9 cm) x 3.0" (7.62 cm)
- Fully integrated GPS receiver, antenna and data collector in one
hand-held unit
- 14-key keyboard including 5 function keys
- External antenna port
- Up to 5 hrs. on internal, rechargeable battery
- Field-replaceable rechargeable battery
CMT Field Software
v3.8
- Collect Points, Lines
Areas
- Feature/Attribute/Value GIS structure
- Graphic plotting.
- Offset function to map hard-to-reach locations.
- Nested point function for tagging points while you are mapping a Line or
Area Feature.
- Averaging function to optimize accuracy while recording static points.
- LLA/UTM/SPC plus user-defined coordinates.
- Supports 50 datums plus user-defined datums.
- On-board area calculation
- Built-in traverse
Obtain
2 cm + 2 ppm accuracy with Carrier Phase
Using the carrier
phase option, the March-II-E-CM can attain centimeter-level accuracy
(2 cm + 2 ppm) without separate data collectors, antennas or poles. Uploading
and processing your carrier phase data in PC-GPS is virtually
the same as processing C/A code data. Behind the scenes, however, is a robust
carrier phase processor (CMTCM) that will provide either a FIXED solution
(ambiguities fixed to integers) or FLOAT solution (ambiguities resolved to
real values). The program will notify you of which type of solution was used.
You may also process the same data with the standard C/A code processor in
PC-GPS.
The March-II-E-CM offers
the ultimate in flexibility, allowing you to do a variety of tasks. It can be
used to record 1 -5 meter data in addition to 2 cm + 2 ppm data. For example,
if you have a job that requires 2 cm + 2 ppm accuracy on the property corners
but only requires 1-5 meter accuracy on the streams running through the property,
the March-II-E would be the perfect tool. It can perform both tasks in the
field without skipping a beat. In the past, you would have needed two
different types of GPS receivers to do this job.
The MARCH-II-E package
includes CMT's PC-GPS
software for comprehensive GPS project management and mapping. PC-GPS
3.8 provides functions for Mapping, Mission Planning, Batch Differential
Correction, Static Point "Spread" analysis and Job Editing. The
software also supports GIS layering, raster images (i.e. DOQs, DRGs, aerial photographs,
satellite imagery), multimedia objects (OLE 2.0) and Microsoft®
ODBC.
System
Accuracy Specifications
|
Real-Time
Differential (DGPS) |
|
DGPS
(2DRMS) |
1-5 m |
|
DGPS
(typical) |
1-5 m |
|
|
|
|
L1
Carrier Phase Post-Processing |
|
Static
(RMS) |
2.5 cm
+ 2ppm |
|
Static
(typical) |
2 cm +
2ppm |
|
|
|
|
L1
C/A Code Post-Processing |
|
Static
(2DRMS) |
1-5 m |
|
Static
(typical) |
1.5 m -
2.5 m |
|
Time to
first fix |
45 sec.
typical, 18 sec. with
current ephemeris |
|
Tracking
sensitivity |
- 139
dBm |
|
Acquisition
sensitivity |
- 105
dBm to -137 dBm |
|
Reacquisition |
<2.5
sec, with <15 sec. interruption |
|
Velocity
(RMS) |
.05
m/sec. |
|
Maximum
velocity |
460
m/sec. |
|
Maximum
altitude |
18,000
m |
|
Maximum
acceleration |
4G |
|
MARCH-II-E Specifications |
|
Operating
System: |
CMT
ROSII® |
|
System
Memory: |
512K
RAM |
|
RAM
Disk: |
MARCH
II©: 2 Megabyte |
|
Environmental: |
Waterproof,
dustproof, shock-resistant |
|
Operating
Temp.: |
-20°C
to 54°C |
|
Display: |
8 lines
x 21characters (64x128 pixel graphics) |
|
Communications: |
Two
9-pin RS-232 serial ports (PC-AT Pin-out).
Baud rate configurable from 300 to 38400 |
|
Keyboard: |
14-key
tactile keyboard with 5 dedicated function keys |
|
Size: |
7.9"
x 3.9" x 3.0" |
|
Weight: |
33
ounces with batteries |
|
|
|
GPS Receiver and Antenna Specifications |
|
Antenna: |
Integrated
Patch Antenna, External Antenna Support (External Antenna Optional) |
|
Capabilities: |
Tracking:
8-channel continuous tracking of C/A Code and Carrier Phase |
|
|
|
|
C/A
Code Differential: |
1-5 m |
|
Carrier
Phase Differential: |
2.5 cm
+ 2 ppm |
|
Position
Update Rate: |
Once
per second |
|
Acquisition
Rate |
|
|
Warm
start: |
18
seconds with current ephemeris |
|
Cold
start: |
<5
minutes |
|
Estimated Battery Life |
|
|
|
GPS
on |
|
GPS
off |
|
Required
Recharger |
|
|
2100 mAH |
4+ hours |
|
2 weeks |
|
ACC-SMC-G3-M |
|
|
**Most MARCH users use a spare
battery to get a full 8 hours of use. |
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