BatNav GPS Receiver User Guide (archive)
Please note – due to positive changes in the bat detector market, we are no longer actively providing or supporting BatNav GPS receivers. We will support existing users as far as we are able, within the warranty period.
Thank you for purchasing your new BatNav GPS Receiver. We hope that the unit will give you many years of successful geo-tagged bat data from your bat survey transects.
The BatNav GPS Receiver can be utilised in a variety of ways when undertaking walked, ridden, or driven bat survey transects in conjunction with an Anabat SD1 or SD2, or Echo Meter EM3 detector. Each bat call will be geo-tagged with its exact position, allowing for maps to be generated showing the time and location of each bat encountered. It can also be used in conjunction with a statically-deployed detector to provide accurate time logs and evidential proof that the detector was at a specific location and time.
The latest BatNav+ GPS receiver is based on the highly rated SiRFstarIV chipset, which has a very high sensitivity to allow a high degree of GPS accuracy – even under trees. Original BatNav units use a SiRFstarIII chip which was the GPS chip of choice for many years. Our Garmin units use a proprietary Garmin chipset.
All the receivers are weather-proof, have a non-slip magnetic base and are completely self-contained. The GPS coordinates are recorded directly to the Anabat’s compact flash card, and can be downloaded and manipulated using the standard CFCread and AnalookW programmes.
BatNav detector requirements
Four versions of the BatNav GPS have been produced:
- BatNav+ (current) – with new SiRFstarIV GPS chip to fit Anabat SD2 and modified Anabat SD1
- BatNav SD1 (discontinued) – to fit the Anabat SD1 and Anabat II/ZCAIM units
- BatNav SD2 (discontinued) – to fit the Anabat SD2
- BatNav Garmin (discontinued) – to fit the Echo Meter EM3/EM3+ and Song Meter SMZC
This user manual contains instructions for the Anabat SD1, SD2, and Anabat II/ZCAIM detectors. Most steps are identical for all detectors but where they differ this will be clearly highlighted. The BatNav+ or BatNav SD2 will not work with an unmodified Anabat SD1 or any Anabat II/ZCAIM.
Anabat detector requirements
It is essential that you use the latest versions of the Anabat firmware, AnalookW, and CFCread software in order for your Anabat and BatNav GPS unit to function correctly. Errors will occur with older versions of the firmware and CFCread. Download the latest firmware and software versions from the Titley Scientific website. When using a new version of the firmware or CFCread for the first time, it is important that you re-initialise your CF card – for instructions please consult the Titley Scientific Anabat SD2 User’s Manual, Compact Flash Cards chapter (also applicable to SD1.)
Anabat power consumption
The BatNav GPS Receiver will draw an additional 80mAh of power from the internal batteries. Under normal use your Anabat will draw approximately:
|Battery type||Anabat SD1||Anabat SD2|
|Alkaline 4xAA||36 mAh||59 mAh|
|Rechargeable 4xAA||47 mAh||76 mAh|
What do those numbers mean in practice? You should consider that the BatNav GPS will use up your bat detector’s batteries around twice as fast as normal, however this should still allow for multiple nights work to be undertaken on one set of batteries. Always carry spares! If you are using an external power source (e.g. in a car) to supply your Anabat SD1/SD2, you must also have 4xAA internal batteries to power the GPS unit. Power consumption has not been published for the older ZCAIM units.
You should always keep your detector firmware up to date, particularly when using external accessories such as GPS units. Don’t forget to upgrade your software as well as the manufacturers are always improving their offerings.)
Connecting your BatNav GPS Receiver
Anabat SD2 version
- Connect BatNav to Anabat SD2 serial port (or modified Anabat SD1.)
- Secure using thumb screws – do not over tighten.
- Check the BatNav GPS status LED on the side of the GPS unit:
- LED off: Receiver switched off
- LED on: No fix, signal searching (see ‘GPS start-up times’ below)
- LED flashing: Position fixed
- Once the BatNav GPS status LED has been flashing for at least 30 seconds turn on the Anabat.
- Check the Anabat is receiving the GPS data – the DATA LED will flash approximately once per second to indicate that GPS data is being received.
- Commence your survey.
Anabat SD1 version
|1. Remove battery cover and lift first battery|
|2. Connect BatNav power lead over the top of the first battery. Re-insert battery to secure BatNav power lead|
|3. Position the cable in a loop between the first and second batteries|
|4. Replace battery cover with supplied BatNav cover and line power cable with cut-out. Carefully close the battery cover guiding the power cable through the cut-out|
|5. Connect BatNav SD1 version to Anabat SD1 serial ‘computer’ port. Secure using thumb screws – do not over tighten.|
Echo Meter EM3/EM3+
- Plug the GPS unit into the network-type socket on the side of the Echo Meter.
- Turn on the detector. A “?” will appear to the right of the time on the bottom line of the screen. If this doesn’t appear then the GPS unit isn’t correctly connected.
- When the GPS has aquired a GPS fix the “?” will change to a “$” and the current GPS coordinates will be displayed to the right
- If the display changes to a “!” then there is an error. Check the connection and try again
- Commence your survey
Song Meter SMZC
- Open the SMZC case
- Plug the GPS unit to the socket on the inside of the case
- Use the magnetic base of the GPS to attach it to the inside of the case
- Connect the GPS unit inside the SMZC – consult the user guide for instructions
- Turn on the SMZC. A “?” will blink on the display between the date and time – the GPS is acquiring location data
- When the GPS has a location fix the “?” will change to an “!” and then a “$” to show that the clock and location is now synchronised.
Whatever detector and GPS you use, it is essential that you wait for the GPS unit to successfully get a position before you start your survey. This is particularly important with the Anabat SD1 and SD2 with which you shouldn’t turn on the detector until the GPS has a position fix.
Positioning the GPS receiver
The GPS receiver should be positioned with a clear view of the sky at all times.
- For handheld use we recommend that it is placed over the Anabat speaker with the GPS magnet holding it in place, as shown in the photos above. This will not affect the unit.
- Echo Meter EM3 GPS units are typically mounted to the back of the detector using the velcro supplied. You can use standard ethernet (aka Cat 5, 5e, or 6) network extension cables to extend the length of your EM3 GPS cable).
- For driven transects the GPS should be positioned on the vehicle dashboard. It can be magnetically mounted to the vehicle roof at low-speeds, but this is at your own risk.
- Other users have mounted their GPS and detector in rucksacks (with GPS at top), and hand-held/helmet-mounted microphones on extension leads.
If you wish to mount the GPS elsewhere on your Anabat please contact us and we will send you a magnetic mounting strip free of charge.
GPS start-up times
The time for the GPS receiver to lock on a position can vary. A brand new GPS unit, or one that has moved a significant distance since it was last activated (e.g. driving to a different survey site), or one that has not been used for several days, may take a longer period of time to start up and lock onto the satellites. GPS signal strength (can vary with weather or other atmospheric conditions), and the surrounding terrain (tall trees and buildings can block the satellite signals) can also affect the unit. The unit should typically acquire a satellite fix within 1 minute regardless. If not, make sure it is outside and has an unobstructed view of the sky with no large structures nearby.
Undertake your walked, ridden, or driven transect as per standard survey guidelines or your own survey protocols. Ensure the GPS receiver has a clear view of the sky at all times wherever possible. Satisfactory signals can usually be received from within the top of a rucksack, or on a car dashboard.
End of survey
- Turn off the detector as normal to ensure all data is saved.
- Disconnect the BatNav GPS from the detector (with Anabats the GPS unit will continue to receive power even when the Anabat is turned off.)
Data retrieval and preparation
Ensure you are using the latest version of CFCread. If you are not familiar with downloading data from your Anabat unit, please consult the Titley Scientific Anabat SD2 User’s Manual, Downloading Data chapter (also applies to SD1.)
When using an Anabat with a GPS unit the detector time will default to that from the GPS signal – Coordinated Universal Time (UTC). A time correction from UTC (between ±1 to ±12) must be entered into CFCread to correct the Analook file times. For countries ahead of UTC (i.e. eastern hemisphere) enter a number from +1 to +12; for countries behind UTC (i.e. western hemisphere) from -1 to -12. Note that you will need to correct for Daylight Savings Time/Summer Time if active in your time zone. For example, in the UK enter ‘1’ for surveys undertaken during British Summer Time, or leave the box blank for winter surveys. For South Africa enter ‘2’ all year-roun. For central Europe enter 1 in winter and 2 in summer time. For for eastern USA enter -5 in Eastern Daylight Time and -4 in Eastern Daylight Time. To check your timezone and UTC offset visit http://www.timeanddate.com/worldclock/city.html For surveys undertaken without the GPS leave the TimeZone box blank or enter zero. Remember, enter the time zone for the date the survey was conducted, not the current time zone at the time of download or analysis (e.g. for analysing summer data during the winter use the summer time zone). Enter time zone correction into the TimeZone field (or leave blank if appropriate) and click ‘Download’:
On the ‘Download Options’ screen keep your usual settings, but ensure that the ‘Wav, GPS etc.’ generate box is ticked. If you choose to generate ZCA files note that the settings differ for the SD1 and SD2:
- SD1/ZCAIM – ‘5m synch’
- SD2 – ‘Raw’
Click ‘OK’ to download your data, and then choose the location to save your files. After the data has downloaded, within the saved data folder you should have a ‘gps.txt’ file, in addition to the status text file, DAT file, and any ZCA or WAV files.
Geo-tagging your calls
CFCread does not automatically add the GPS coordinates to each Analook file. Follow this procedure to manually geo-tag your bat calls.
- Open the first of your calls in AnalookW
- Click on Tools –> Anahead (ignore any error messages, if they appear)
- The Anahead window has three sections:
- Left column – a windows folder tree
- Middle column – any Anabat files in the selected folder
- Right column – any selected tracks
- The Anahead window has three sections:
- Check that the calls in the middle column are from your GPS-tracked survey.
- Click Positions –> Choose File.
- Find the gps.txt file for your survey, select it, and click ‘Open’. The selected track should appear in the right hand column.
- The track name will be displayed in the following format – TK yyyy-mm-dd hh:mm:ss hh:mm:ss e.g. TK 2011-06-25 21:00:00 23:30:00, for a survey on the 25th June 2011, with the GPS data saved from 2100 to 2330.
- Click Positions –> Track. The following window will appear – click Yes.
- A small window will state ‘Processing files’ as it scans through all the selected files.
- If you receive an error stating “Not all files included in chosen track” or “Chosen track doesn’t include first file” then you will need to select only the files in the middle column that are within the track times. See the Troubleshooting section at the back.
- If no errors are displayed, close Anahead. If you then scroll through your files in AnalookW, the position for each file will be displayed in the file header at the bottom of the screen (Click View à Header if not already visible).
Labelling your calls
In order to gain maximum benefit from the KML Generator you should process your Anabat data prior to mapping, and label all files where possible. Optional, but increases the value of the subsequent map, or allows you undertake data analysis using Microsoft Excel etc.
Configure species list
In AnalookW open the Species toolbar, if not already displayed (Toolbar: View –> Species List) An array of 40 buttons will appear at the top of the screen. If you right click on each button in turn you can add a label up to 8 characters long (letters and numbers only, with limited punctuation – no spaces, commas etc.) When your species list is complete save it by clicking the ‘Save As’ button to the right hand end of the Species List.
How to label a call
- Display a call in the Analook window.
- Analyse the call in your normal manner to ascertain the species/family/genus.
- Click on the appropriate species button to label the call. You will see the species appear in the ‘Species’ field in the Header toolbar at the bottom of the window (Toolbar: View –> Header)
For further information on labelling calls, and using filters and scans to semi-automate your identification visit www.anabattraining.co.uk
A number of factors can cause problems when using any GPS unit with the Anabat SD1 or SD2. Commonly encountered problems are:
|The GPS receiver light is always on||The GPS receiver cannot fix onto the satellite signals – the signal is blocked by buildings, interference, atmospheric conditions, or the USA has turned off the GPS system!||Ensure that your GPS receiver has the clearest possible view of the sky, and allow up to 5 minutes for the receiver to lock on.|
|My Anabat was in one location all survey but the GPS position moved||This is an artefact of the accuracy of the GPS system, which is affected by signal strength and position of the receiver. The position may wander around a fixed point by as much as 50m.||Ensure that your GPS receiver has the clearest possible view of the sky.|
|My GPS log stopped before the end of my survey but the Anabat still continued to record bats||The internal batteries did not have enough power to run the GPS.The GPS needs a minimum of 4.5 volts, whereas the SD2 will run with a minimum of 4.0 volts (low battery warning @4.3V, power off @3.9V)The voltage will drop over the course of a survey, particularly when the batteries are towards the end of their life, and/or in cold conditions.||Install fresh alkaline batteries (4 x AA = 6 volts).If you’re using rechargeable batteries (most NiMH are 1.2V so 4x = 4.8V) the GPS unit may power down quickly.Use fresh batteries at the start of each survey.SD2 – check the log files on the CF card – they will indicate the battery voltage at the start and end of the recording session.|
|No gps.txt file in folder||No GPS unit connected/no GPS fix received||Your calls cannot be geo-located. Ensure that the GPS receiver is connected and has a signal for future surveys.|
|Generate GPS, Wave etc. option not selected||Re-download your data and ensure that ‘Generate GPS, Wave etc.’ is ticked|
|Error “Error 8 Writing to Bat File” in the CF log files. The Anabat will have recorded no data, despite the lights indicating that the unit was recording.||A known issue with SD2 firmware version v4055g.||Contact Titley Scientific for a firmware upgrade to version v4056g.UK office:e: firstname.lastname@example.org: 02920 022 099For other regions visit www.titley-scientific.com for details of your local office.|
|My Anabat file times do not correspond to the survey times (and are not just an hour out of synch). The start times will likely be correct, but the final calls will appear to have been recorded after your survey was completed and the Anabat switched off.||You have downloaded the data using an older incompatible version of CFCread.||Download your data again from the CF card using the latest version of CFCread.If you have erased your CF card you can download the data from the .DAT file saved in the original folder.|
|Upon opening Anahead “An invalid argument was encountered”||Unknown. This error has appeared in several recent versions of Analook.||Click OK. No known side effects.|
|In Anahead “Not all files included in chosen track”||Some of the Anabat call times are outside of the GPS track times.||Check you have selected the correct gps.txt file for your survey.Check that your data was downloaded with the correct TimeZone option.|
|In Anahead “Chosen track doesn’t include first file”||Your Anabat has been turned on before the GPS unit, or a GPS signal was not fixed before the survey commenced.This can often occur when you have tested your Anabat unit earlier in the day before commencing the survey – i.e. before leaving the office.||Select only the files in the central Anahead column that are within the track times in the right hand column|
|Google Earth shows my route but no bat calls are displayed||The timeline start and end times have changed, often when you have changed which species are hidden/shown.||Drag the start and end time sliders to the left and right sides respectively of the time line. See information in the previous chapter.|