Trimble 4000SSE Operator's Manual
October, 1995
UNAVCO
Trimble 4000SSE Operator’s
Manual
This manual contains information prepared by the University Navstar Consortium
(UNAVCO) to assist Global Positioning System (GPS) operators in the successful
acquisition of research data. UNAVCO is sponsored by the National Science Foundation
to make GPS resources available for geoscience research. Please let us know how this
manual might be improved by contacting:
Katie Chick ..................................................................... (303) 497-8002
info@unavco.ucar.edu
FAX: (303) 497-8028
UNAVCO
University Corporation for Atmospheric Research
P.O. Box 3000
Boulder, Colorado 80307-3000
USA
October, 1995
1 Field Training Outline
1.1 Overview
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1.1.1 Introduction to training class:
1.1.2 Equipment
1.1.3 Tripod and Tribrach
1.1.4 Antenna
1.1.5 Measure Height of Antenna
1.1.6 Power Setup
1.1.7 Power-up Receiver
1.1.8 Documentation
1.1.9 Downloading / End of Survey
1.1.10 Run your own survey
1.1.11 Troubleshooting
1.2 Suggestions
2 Tripod Set Up Procedure
2.1 For Tribrach with Non-rotating Optical Plummets
2.2 For Tribrach with Rotating Optical Plummet
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3 Trimble 4000 SSE Equipment Configuration for GPS Surveys
3.1 Power Requirements
3.2 Preparing for a GPS Survey
3.2.1 Antenna set-up
3.2.2 Power Configurations for the Trimble 4000SSE
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4 The Trimble 4000SSE Control Parameters (ver 6.12)
4.1 The Receiver’s Control Parameters
4.1.1 Logged Data Files
4.1.2 RTCM-104 Controls
4.1.3 Power-up Mode
4.1.4 SV Enable/Disable
4.1.5 Adjust Local Time
4.1.6 Baud Rate /Format
4.1.7 Remote Protocol
4.1.8 Reference Position
4.1.9 Masks/Sync Time
4.1.10 Positioning Mode
4.1.11 Power Control
4.1.12 L1/L2 Operations
4.1.13 NMEA-183 Outputs
4.1.14 Cycle Printouts
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4.1.15 PPS Output and Time Tag
4.1.16 Event Markers
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4.1.17 Default Control Parameters
5 4000SSE Short Programming Sheet
5-1 Using the Modify Key for the Trimble 4000SSE
5-1.1 View Angle
5-1.2 Backlight
5-1.3 Power
5-1.4 Units of Measure
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October, 1995
5-1.5 Beeper Volume
5-1.6 Altitude Reference
5-1.7 Kinematic Alarms
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6 Downloading Trimble 4000 SSE Data with UNAVCO Command Assistant
6-1 Computer and Receiver Configuration
6-2 Turning on the Computer
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6-3 Starting Trimble 4000 Downloading Software
6-4 Trimble 4000 Software Menu
6-5 Data File Display
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6-6 Selecting a Data File Destination
6-7 Renaming files
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6-8 Selecting a Data File to Download
6-9 The Downloading Process
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6-10 Transferring Data to Floppy Disk.
6-11 Reading the Message (.MES) File
6-12 Checking Data Files on Floppy Disk
6-13 In Case of Power Failure
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6-14 Deleting Files using the 4000 Program
7 Disk Label Format
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July, 1995
1 Field Training Outline
This outline is a supplement to the instructions received from the UNAVCO engineer on GPS data
collection procedures. Verbal, visual, and, most importantly, hands-on instruction are necessary for an
operator to learn proper field techniques. These skills need to be attained during the training period - not
out in the field. Upon completion, operators must demonstrate the ability to responsibly operate and care
for field equipment.
1.1 Overview
1.1.1 Introduction to training class
a. Review schedule of training class.
b. Introduction of Principal Investigators (PI’s), instructors, and participants.
c. PI explains scientific objectives of the project and items of interest.
d. Project Engineer explains his/her role and responsibilities.
e. Receive notebooks, log sheets and handouts.
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1.1.2 Equipment
a. Have a system already configured.
b. Assign receiver/system to the primary operator and explain the responsibilities of the operator:
Review the following.
c. Equipment checklist.
d. Unpacking and packing equipment.
e. Dropped or broken equipment. Report any problems to the engineer without hesitation.
f. Transporting equipment.
g. Care of computers and diskettes.
h. Transporting data.
i. Explanation of all equipment on the manifests.
1.1.3 Tripod and Tribrach
a. Tripod Set Up Procedure Chapter 2.
♦ Operators learn to set up a tripod and tribrach.
♦ Operators are given potential problems. Example: set up on a hill or on uneven
terrain.
1.1.4 Antenna
a. Explain the parts of the antenna and how it works.
♦ Location of the patch and electric phase center.
♦ Magnetic declination and importance of setting true north.
♦ Ground plane and multipath.
♦ Waterproofness and the role of the desiccant.
♦ Antenna cables.
♦ coiling the cable.
♦ dirt in the plugs.
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♦ don’t step on or pull on cables.
♦ first connect cable to the antenna first then to the receiver.
♦ stay away from the antenna during observations.
1.1.5 Measure Height of Antenna
a. How to read height stick.
b. Check independently with tape measure in inches.
c. Measure height and document it on log sheet.
♦ all 3 readings should be within 1 mm. This confirms the antenna is level.
♦ if greater than 1mm measure all notches and note problem on log sheet.
1.1.6 Power Setup
a. Explain power requirements of the receiver and length of time it takes a battery to lose all
power.
♦ Hand out ESG battery recommendations report.
♦ Car batteries.
♦ Explain jumping batteries in parallel and series.
♦ Demonstrate configuration with solar panels.
♦ Explain short circuiting, checking fuses and checking voltage.
♦ Charging batteries.
♦ OSM appears on screen.
♦ Explain the use of OSM or power download cable as alternate power supply.
♦ Power problems.
b. Connect battery to receiver.
July, 1995
1.1.7 Power-up Receiver
a. Hand out the Trimble Short Programming Sheets from the Investigators Manual.
b. Explain care of receiver.
♦ keep out of rain and sun.
♦ run survey in a tent, kinetics box or B box.
♦ fill out logbook after every observation session.
♦ Explain 6 ports in the rear of the receiver.
♦ Power up the receiver and watch self tests as they appear.
♦ Run through Trimble Short Programming Sheets.
1.1.8 Documentation
a. Explain all the boxes on the log sheets and have the operators fill it out legibly and correctly
as they conduct the survey.
b. Emphasize the use of all handouts. When in doubt refer to the handouts.
c. Field log sheets, diskette labels and receiver logbooks.
d. Updating station descriptions.
e. Collect all log sheets at the end of the day and correct them and return to the operators.
f. Emphasize the importance of filling out the logbooks for the receivers.
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1.1.9 Downloading / End of Survey
a. Stop the survey or watch the programmed stop and refer to Downloading Trimble 4000 Data
chapter 6.
b. Demonstrate the configuration of the download equipment.
♦ Demonstrate the setup of the OSM as an alternative to the download cable.
♦ Re-iterate care of computers. Avoid heat, dust and magnets.
c. Documentation on diskettes and log sheets.
d. Re-check antenna height and if centered exactly over the mark
e. Packing up and preparation for next day
♦ Demonstrate exactly how equipment should be packed in the box.
♦ Demonstrate tent setup and packup.
f. Charging batteries.
g. Check manifests.
h. Transportation to the next site.
i. Communication with engineer if necessary.
♦ Report any problems or tracking difficulties to the engineer.
July, 1995
1.1.10Run your own survey
a. Make all primary operators run their own survey from start to finish. Supervise carefully.
♦ Check antenna height and plummet.
♦ Check general system configuration.
♦ Check and correct parameters set during programming of survey.
♦ Documentation and download.
1.1.11Troubleshooting
a. Things to check at the beginning of the survey.
♦ Start and end times of the survey.
♦ Parameters programmed into the receiver.
♦ SNR values and continuous and total L1 and L2 observations.
b. Things to check during the survey.
♦ SNR values and continuous and total L1 and L2 observations.
♦ Position and velocity of position.
♦ Watch for animals or people near the equipment.
♦ Discuss danger of electrical storms.
♦ What to do in case of low battery power.
♦ What to do in case of power failure.
♦ What to do in case the antenna is off level during the survey.
c. Things to check at the end of the survey.
♦ What to do in case the antenna is off level at the end of the survey.
♦ What to do in case of power failure.
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1.2 Suggestions
a. Remember to allow 1 & 1/2 --> 2 hours to set up all equipment and program the receiver for
the first observation session.
b. Take care not to confuse UTC time and local time when programming the survey.
c. Use the correct parameters as defined by the PI when programming the survey.
July, 1995
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2 Tripod Set Up Procedure
2.1 For Tribrach with Non-rotating Optical Plummets
a. Extend tripod legs so the top of the tripod head comes up to your chin. Lock legs at this height
with the leg screws. If the ground is not level the legs will have to be extended at different
lengths.
b. Attach tribrach to tripod head using the large center screw on the tripod head. Make sure that
the leveling foot screws on the tribrach are centered half way between their range of movement.
c. Open tripod legs over the mark and step (set) one leg into the ground at about a 45o slant angle
and about 3 feet from the station mark. Look through the optical plummet and position the cross
hairs over the point using the remaining two tripod legs. If viewing or crosshairs are out of focus
adjust the crosshairs ring first until the crosshairs appear clear and crisp. Adjust the focus ring
until the image is in focus. To check for parallax slowly move your head around while looking
through the optical plummet. You should see no movement between the crosshairs and the
focused background (this is known as being out of parallax), nor should the crosshairs move
apart.
d. Once the cross hairs are within 1 cm of the point and the head of the tripod is visually level,
step the remaining two legs into the ground. At this point sand bag or tie down the tripod legs.
e. Precisely position the tribrach crosshairs over the point using the leveling foot screws on the
tribrach.
f. Level the bull’s-eye bubble on the tribrach by using two tripod legs. (Do not level using the tri-
brach foot screws.) At this point you are leveling the tripod head.
g. When the bubble is within the circle of the bull’s eye use the tribrach leveling foot screws to
precisely center the bubble.
h. Once the bull’s-eye bubble is precisely level, look through the optical plummet to ensure that
the crosshairs are over the point or at least within a few cms. Center the crosshairs precisely
over the point by loosening the tripod head screw and gently slide the tribrach over the point.
When centered tighten the tripod head screw.
i. Check the level bubble. If the level is outl:
♦ just a little - repeat steps g & h.
♦ by a lot - (more than a couple of mms) - repeat steps e,f,g,h.
j. Check the set up and calibration of the tribrach by attaching the plumb bob to the tribrach head
screw so it hangs over the point. It should hang precisely over the point +/- the plumb bob string
width. NOTE: This will not necessarily be true in windy conditions. In windy conditions the
plumb bob will be blown away from the mark. If the site is located in an area with high winds
the calibration of the tribrach can be checked indoors by performing the set up procedure.
July, 1995
2.2 For Tribrach with Rotating Optical Plummet
a. Proceed with steps 2-1(a-i).
b. Turn the tribrach so that the plate bubble tube is parallel to two footscrews. Center the bubble
by adjusting these two footscrews in equal and opposite directions.
c. Turn the tribrach through 90 degrees. Center the bubble with the third footscrew.
d. Turn the tribrach through 90 degrees so that the bubble is parallel to the first 2 footscrews. Note
position of bubble. If the bubble is centered between the middle divisions, then the tribrach is
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level in this plane. If the bubble sits more than one division off center, then note how many
divisions off center it lies and by adjusting the two footscrews in equal and opposite directions
bring the bubble toward the center by half the amount it was off center before. Turn the tribrach
through 180 degrees again and check where the bubble rests. Repeat the process until the
bubble is within one division of the central division.
e. Now turn the tribrach through 90 degrees and check the level in this plane. Note the position
of the bubble. If the bubble is off center by more than one division, turn the third footscrew to
bring the bubble to a point halfway between the position noted and the centered position.
Rotate through 180 degrees and check again using the third footscrew for any fine adjustment.
f. Now rotate the tribrach through 360 degrees and check if the bubble remains within 1 division
of the center for any position.
g. Center the adapter precisely over the point by loosening the tripod head screw and gently slid-
ing the tribrach over the point. When centered tighten the tripod head screw.
h. Check the set up and calibration of the tribrach by rotating the adapter 180 degrees and check
the plummet. If the tribrach is off center by more then 1mm then loosen the tripod head screw
and gently slide the tribrach half the distance it was off. Rotate the adapter 180 degrees and
recheck the plumb. The offset should be the same. If not repeat this step again.
Figure 2-1 Diagrams of the two types of T ribrachs.
optical plummet
Non-Rotating Optical Plummet
July, 1995
focus ring
crosshair ring
tribrach
optical plummet
crosshair ring
focus ring
leveling
foot screws
tripod
head screws
tripod head
tripod
Rotating Optical Plummet
plate level tube
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