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Collecting data

See the remaining sections in this chapter for more 

information on collecting data.

• 

Turn on the receiver.

• 

Once the receiver has locked on to eight or more 

satellites the STAT light will green. 

• 

The process of locking on to satellites normal-

ly takes less than one minute. In a new area, under 

heavy tree canopy, or after resetting the receiver, it 

may take several minutes.

• 

To begin collecting data, press and hold the FN 

button (for more than one second and less than five 

seconds).

• 

Release the FN button when the REC (recording) 

LED turns green. This indicates that a file has opened 

and data collection has started. The REC LED blinks 

each time data is saved to the internal memory.

• When finished, press and hold the FN button until 

the REC LED light goes out.

To turn off the receiver, press and hold the power key 

until all lights go out, then release.

Static Surveying for Base Stations

Static surveying is the classic survey method, well 

suited for all kinds of baselines (short, medium, long). 

At least two receiver antennas, plumbed over survey 

marks, simultaneously collect raw data at each end of 

a baseline during a certain period of time. These two 

receivers track four or more common satellites, have 

a common data logging rate (5–30 seconds), and the 

same elevation mask angles. The length of the obser-

vation sessions can vary from a few minutes to several 

hours. The optimal observation session length depends 

on the surveyor’s experience as well as the following 

factors:

• 

The length of the baseline measured

• 

The number of satellites in view

• 

The satellite geometry (DOP)

• 

The antenna’s location

• 

The ionospheric activity level

• 

The types of receivers used

• 

The accuracy requirements

• 

The necessity of resolving carrier phase ambigu-

ities

Generally, single-frequency receivers are used for 

baselines whose lengths do not exceed 15 kilometers 

(9.32 miles). For baselines of 15 kilometers or greater, 

use dual-frequency receivers.

Dual-frequency  receivers  have  two  major  benefits. 

First, dual frequency receivers can estimate and remove 

almost all ionospheric effect from the code and carrier 

phase measurements, providing much greater accuracy 

than single-frequency receivers over long baselines or 

during ionospheric storms. Secondly, dual-frequency 

receivers need far less observation time to reach the de-

sired accuracy requirement.

After the survey completes, data the receivers col-

lect can be downloaded onto a computer and processed 

using post-processing software (for example, JAVAD 

GNSS Justin).

Kinematic (Stop & Go) Surveying for Rover 
Stations

In a kinematic, stop and go survey, the stationary re-

ceiver (Base station) is set up at a known point such as 

a survey monument, or an unknown point. The receiver 

continually tracks satellites and logs raw data into its 

memory. The Rover receiver is set up at an unknown 

point and collects data in static mode for 2 to 10 min-

utes. When finished, assign the Rover to kinematic sta

-

tus and move to the next survey point. At this point, and 

each subsequent point, the receiver is changed to static 

mode to collect data. So, while moving, the Rover is in 

kinematic mode, and while collecting data, the Rover is 

in static mode.

• 

Set up the Rover at an unknown point and press 

power. Allow the Rover to collect static data for two 

to ten minutes. The REC LED will be yellow.

• 

Check the SAT light for satellites tracked. 

• When finished, press the FN button for less than 1 

second to assign the Rover to kinematic.

• 

Move the Rover to the next location (survey point), 

and press the FN button for less than a second to col-

lect the data in static mode for two to ten minutes. 

• Repeat steps five and six until all points have been 

surveyed. The occupation time for the points de-

pends on the same factors as for the static survey 

method. 

• When finished, press the FN button for one to five 

seconds to stop logging data. Turn off the Rover if 

needed. This method of GNSS survey allows the 

operator to reduce the point occupation time, thus 

permitting field crews to survey many more points 

compared to the other methods available. 

Summary of Contents for DELTA-3

Page 1: ...erved The information contained herein may not be used accessed copied stored displayed sold modified published or distributed or otherwise reproduced without express written consent from JAVAD GNSS DELTA 3 GNSS Receiver User Manual Version 1 0 Last Revised January 26 2015 ...

Page 2: ... power ports 7 Turning On Off 7 Power supply requirements 7 Powering the receiver 8 Cables 8 Option Authorization File OAF 8 Managing and Operating Receiver using NetView 8 Configuring Receiver 9 TriPad Configuration 12 Setup and survey 13 Receiver and File Maintenance 15 Managing Receiver Options 16 Clearing the NVRAM 16 Checking Firmware Version 16 Troubleshooting 17 Safety Warnings 19 Storage P...

Page 3: ... GNSS Windows is a registered trademark of Microsoft Cor poration Bluetooth word mark is owned by the Blue tooth SIG Inc Product and company names mentioned herein may be trademarks of their respective owners DISCLAIMER OF WARRANTY EXCEPT FOR ANYWARRANTIES IN THIS MANUALORAWAR RANTY CARD ACCOMPANYING THE PRODUCT THIS MANUAL AND THE DELTA 3 RECEIVER ARE PROVIDED AS IS THERE ARE NO OTHER WARRANTIES ...

Page 4: ...may seek a protective order or other appropriate remedy WEBSITE OTHER STATEMENTS No statement contained at the JAVAD GNSS website or any oth er website or in any other advertisements or JAVAD GNSS literature or made by an employee or indepen dent contractor of JAVAD GNSS modifies these Terms and Conditions including the Software license war ranty and limitation of liability SAFETY Improper use of ...

Page 5: ...tes of the Russian Federation the QZSS is a proposed three satellite regional time transfer system and Satellite Based Augmentation System for the Global Positioning System that would be receivable within Japan and the Beidou Compass Chinese Global Navigation Satellite System increas ing the number of satellites your receiver can detect thus improving the accuracy of your measuring points increasi...

Page 6: ... Two LEDs two function keys TriPad Memory and Recording Internal Memory Up to 16 GB of on board non removable memory for data storage Raw Data Recording Up to 100 times per second 100Hz Real Time Data Input Output JPS RTCM SC104 v 2 x and 3 x CMR Output NMEA 0183 v 2 x and 3 0 BINEX Environmental Enclosure Aluminum extrusion waterproof IP66 Operating Storage Temperature 40 C to 70 C 45 C to 85 C H...

Page 7: ...ceiver press and hold the power button for more than one and less than four seconds until both the SAT and the REC LEDs are off This delay about 1 second will prevent the receiver from being turned off by mis take DELTA 3 saves the last power status and restore it after voltage loss Power supply requirements The socket outlet shall be installed near the equip ment and shall be easily accessible A ...

Page 8: ... DELTA 3 receivers ship with a tem porary OAF that allows the receiver to be used for a predetermined period of time When the receiver is purchased a new OAF activates desired purchased op tions permanently Receiver options remain intact when clearing the NVRAM or resetting the receiver Managing and Operating Receiver using NetView This software is available on the JAVAD GNSS web site If downloadi...

Page 9: ...ts current location to accu rately calculate one or more points Rovers are mobile GNSS receivers on a survey pole or bipod that com pares the information from the Base station to the data it logs from satellites and applies correction algorithms to accurately calculate a new point In applications intended for post processing the re ceivers typically log code phase and or carrier phase measurements...

Page 10: ... ID such as the last 3 digits of receiver s serial number By deafault the prefix is log FN key mode starts stops the data recording when FN button is used Select LED blink mode switch for Static data Select Occupation mode switch for RTK Initial dynamic mode Select Dynamic for trajectory survey ClickApply every time after the parameter was changed otherwise the receiver won t save the changes Clic...

Page 11: ...n computing the rover s current RTK position If Delay is selected the rover will not extrapolate the base station s carrier phase measurements to com pute the current rover position Instead the RTK en gine will compute either a delayed RTK position for the epoch to which the newly received RTCM CMR message corresponds or the current stand alone po sition while waiting for new RTCM CMR messag es co...

Page 12: ...hs is shown In the Implicit Message Output Period edit box the output period for the implicit messages can be spec ified This parameter specifies the interval of output ting messages into the log file when data logging is activated with the TriPad or through the AFRM Elevation Mask for Measurements Output the minimum elevation angle for the satellites whose data will be put in the receiver files l...

Page 13: ...in which the elevation of the points is important and in surveys for horizontal location only Horizontal surveys are of ten larger in area than can reliably fit on a flat plane therefore the antenna adjustment must be done in three dimensions and then projected onto a two dimensional plane The receiver calculates the coordinates of the anten na s phase center To determine the coordinates of the st...

Page 14: ...equency receivers Dual frequency receivers have two major benefits First dual frequency receivers can estimate and remove almost all ionospheric effect from the code and carrier phase measurements providing much greater accuracy than single frequency receivers over long baselines or during ionospheric storms Secondly dual frequency receivers need far less observation time to reach the de sired acc...

Page 15: ...n percentage Time in seconds elapsed since the last re ceived message Total number of received correct messages de pendent on the message type received Total number of received corrupt messages de pendent on the message type received If the receiver is not for some reason receiv ing differential corrections or if none of the ports has been configured to receive differential correc tions the LQ fie...

Page 16: ...on The NVRAM also keeps the current receiver s set tings such as active antenna input elevation masks and recording interval and information about the receiver s internal file system Even though clearing the NVRAM is not a com mon nor normally a recommended operation there are times when clearing the NVRAM can eliminate communication or tracking problems Clearing the NVRAM in your receiver can be ...

Page 17: ...Reset Restore default settings using NetView Receiver name on the left panel 4Actions4Initial parameters Clear the NVRAM If the problem persists see the following sections for other solutions Receiver Problems The following are some of the most commonly en countered receiver problems Cable specific problems The cable is not properly plugged in Check that the cable connector is attached to the cor ...

Page 18: ...ting and or receiving antenna may be improperly connected Check that the radio modem s antenna is securely and properly connected to the antenna connector Check that the radio modem s antenna is undamaged If damaged contact your JAVAD GNSS dealer to re place the antenna The specified baud rate is incompatible with the baud rates the receiver supports The baud rate is the rate at which the receiver...

Page 19: ... 40 to 85 C and no exposure to direct sunlight Use a clean cloth moistened with a neutral detergent or water to clean the receiver Never use an abrasive cleaner ether thinner benzene or other solvents Always make sure the instrument is completely dry before storing Dry the receiver with a soft clean cloth General Warnings JAVAD GNSS receivers are designed for measuring and measuring related uses t...

Page 20: ...ted without care erroneous measurements may oc cur Do not connect or disconnect equipment with wet hands you are at risk of electric shock if you do The owner should periodically test this product to en sure it provides accurate measurements Inform JAVAD GNSS immediately if this product does not function properly Only allow authorized JAVAD GNSS warranty ser vice centers to service or repair this ...

Page 21: ...www javad com 21 ...

Page 22: ...900 Rock Avenue San Jose CA 95131 USA Phone 1 408 770 1770 Fax 1 408 770 1799 www javad com All rights reserved JAVAD GNSS Inc 2015 ...

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