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TRAJECTO
TRAJECTO
Trajecto is a scientific instrument intended to follow the flight of bats and determine their trajectories in real time. Currently, any construction of a road infrastructure, any change to a lighting system or even any installation of a new wind turbine requires an ecological impact study.
This consists, for example, in recording the diversity of species at the target location and in analyzing the passageways of diurnal and nocturnal animals. In this way the impact of the achievement will be measured and the authorization will be given or not.
Another example, bats are identified by their ultrasonic calls. The success rate does not, however, exceed 70-80% and even less for species that are little observed. The modulation of these calls depends on their flight status: in transit, hunting or capture. The addition of additional measurement parameters makes it possible to increase this rate. Knowing also that a bat flies more or less quickly also allows to know its area of action and therefore limit, for example, deforestation.
These examples show the usefulness of Trajecto as it had been used in the field in 2013 in the Democratic Republic of Congo, in 2016 in French Guiana and in 2019 in Benin. In the Congo he helped to rediscover an endangered species: glauconycteris superba. It has also been used several times in different projects revolving around the ecology of bats: to study upstream the impact of a road deviation (Tacotac project) or the influence of the color of led lamps on the ecology of bats (Chirolum project). Currently, the Trajecto system is part of the standard equipment of various research groups [1][2].
Trajecto was developed by Ros Kiri Ing PhD and Alexandre Hassanin PhD, respectively doctors in physics and biology, initially at the Langevin Institute, Paris, France. It has benefited from continuous development for more than ten years and has been tested several times in the field by uninitiated people. Trajecto is initially used with a computer with minimum system requirements (Trajecto V1 & V1 EVO). in 2024, a second version (Trajecto V2) operates without a computer - data are stored in 32 Go SDHC Card - and will thus make it possible, with several stand-alone systems, to cover larger study areas.
The Trajecto V1 & V1 EVO systems are no longer offered for sale because the Trajecto V2 system is a superior replacement. This policy aims to reduce manufacturing costs and ultimately lower the prices of our products for greater accessibility.
The Trajecto V2 system can emulate the operation of the Trajecto V1 EVO system thanks to the Menuo for Trajecto V1 EVO software. In this case, it allows you to view in real time the bats' calls and their trajectories using a computer while recording the microphone signals in WAV format.
Trajecto V2 systems can also operate as simple 4-channel simultaneous recorders using either Menuo for BR4 V1 EVO or Menuo for BR4 V2 softwares. This feature is offered because it allows the equipment to be used in the field when 3D localization is not always necessary.
(pack TRAJECTO V1 with ME02 and M02)
Trajecto V1 (Not available, for reference only)
Trajecto V1 (Not available, for reference only)
SUVA-TECH Trajecto is developed from the BATAK system which has been tested in real use conditions in various latitudes for almost 10 years ... Trajecto is a sophisticated, robust, sensitive and complete system. It is based on a Keysight TM brand low noise instrumentation class (500kHz / 16bit) acquisition card. It has 4 microphones based on the famous KNOWLES FG-23329 connected to low noise preamplifiers and 60dB of gain. One of the microphones is calibrated using a Bruel & Kjaer TM brand reference microphone. Ultrasonic transmitters built into the microphones are used to calibrate the system before use.
Using Trajecto is simple. All you have to do is to place the 4 microphones in a star configuration, to connect them to the central box, to sit in front of the computer and to start the Menuo program. Calibration is automatic. You just have to observe the trajectories of the bats that evolve above Trajecto.
Trajecto V1 EVO (Not available, for reference only)
Trajecto V1 EVO (Not available, for reference only)
TRAJECTO V1 EVO works identically to TRAJECTO V1. It uses new acquisition electronics developed by SUVA-TECH. Its performance is comparable to the TRAJECTO V1 for a lower cost.
Power is supplied by 2 x 9V batteries and the USB port.
(pack TRAJECTO V2)
Trajecto V2
Trajecto V2
TRAJECTO V2 is a system comparable to V1 and V1 EVO but it can work without a computer. Data are stored on an SD card (up to 32 Go of data). Power is supplied by one 18650 LiPO battery and 2 x 9V batteries.
The TRAJECTO V2 system can emulate the operation of the TRAJECTO V1 EVO system thanks to the Menuo for Trajecto V1 EVO software. In this case, it allows you to view in real time the bats' calls and their trajectories using a computer while recording the microphone signals. When the measurement conditions are deemed correct, you can then switch TRAJECTO V2 to stand-alone mode, disconnect the computer and temporarily leave the measurement site before returning later to retrieve the equipment.
Specifications
Specifications
Electronic Digital Recorder DR02 (developped by SUVA-TECH)
Number of input channels 4 simultaneous A/D converters
Resolution 16 bits
Maximum sampling rate per channel 320 kSa/s
Frequency response 1 – 160 kHz
Input range +/- 1.25 V
Output channel 1 simultaneous D/A converter
Resolution 12 bits
Alphanumeric display 2 x 16 characters
Power supply 1 x Li-Po 18650 batteries (not included)
2 x 9 V batteries (not included)
Microphones (based on FG 23329TM Knowles )
3 x ME01a1 (with emitter) and 1 x M01a1 (without emitter) (ABS enclosure)
Gain > 60 dB @ (20kHz - 160kHz)
Input sensitivity ~500 mV/Pa @ 40 kHz
Weight 30-35g (each)
Ultrasonic emitter 1 x E01 (MA40S4STM Murata) (ABS enclosure)
Physical dimensions 200x 105 x 33 mm2 (electronic main box DR02)
Weight 250g (without batteries)
Housing ABS enclosure
Softwares Menuo for TrajectO V2 including: Trajecto calibration & WAVfile generation, Trajecto, Analyzeo, Visuo and Tools (bat calls are recorded in WAV format)
Convert2CSV: Utility software to generate CSV files readable with any spreadsheet. (5)
Computer interface USB 2.0
Physical USB connection C-type USB socket
Computer minimum configuration Intel Core i5 processor at 1.8 GHz, running Windows 10 (21H2) or later. Tested on PC and MAC (with Intel processor and bootcamp) computers
User manual (english)
NEW PRICE LIST!!! (March, 2026)
Pack TRAJECTO V2 (including DR02, 3 x ME01a1, 1 x M01a1, 1 x E01, 1 x SD card and Menuo for TrajectO V2 and Convert2CSV softwares) $2790 USD (1)(2)(3)(4)
Additional softwares compatible with TRAJECTO V2 system:
Additional softwares compatible with TRAJECTO V2 system:
Menuo for TrajectO V1 EVO including: Trajecto calibration, Trajecto, Analyzeo, Visuo and Tools (bat calls are recorded in WAV format) $790 USD (1)(3)(4)
Menuo for BR4 V1 EVO: 4-channel simultaneous recorder with PC backup $190 USD (1)(3)(4)
Menuo for BR4 V2: 4-channel simultaneous recorder working in standalone mode (backup on SDCARD) $190 USD (1)(3)(4)
Angulo
Angulo
ANGULO is a compact antenna* which deploys very quickly making the use of the TRAJECTO system even easier. Due to its limited size it is mainly used for measuring bat flows to identify flight corridors and flight directions. However, it has a good 3D positioning accuracy for distances up to 10m** although it is able to identify calls up to a distance of about 30m** thanks to its sensitive microphones. ANGULO is therefore also a good tool for trajectory measurements in forest undergrowth.
ANGULO deploys like an umbrella and replaces the microphone set of the TRAJECTO system. On site, it can be set up very quickly, and then simply connected to the DR01 electronics of the TRAJECTO system.
*ANGULO is a compact antenna and requires the TRAJECTO system to operate ** this distance depends on the acoustic intensity level of the bat call at the microphones
Microphones (based on FG 23329TM Knowles )
Gain > 60 dB @ (20kHz - 200kHz)
Input sensitivity ~500 mV/Pa @ 40 kHz
Ultrasonic emitter MA40S
System support Tripod support of 1m height in inox or aluminum
Analog input / output connectors Female JACK 3.5 mm
Cables 3 m shielded cables
(1) Discount for universities and public research laboratories
(2) Delivery time upon receipt of the order form: ~ 1 month
(3) 50% deposit on order and 50% upon receipt of invoice - only for institutions and private companies
(4) Indicative price as of March, 2026.
(5) The data generated are the x, y and z positions of the bats as well as their estimation errors, frequency data, call durations, energies, etc.
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