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AEROcontrol
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AEROcontrol

AEROcontrol is IGI's GPS/IMU system for the precise determination of position and attitude of an airborne sensor. This can be the position of the projection center and the angles omega, phi, kappa of the aerial camera system or an airborne laser scanner.

The AEROcontrol system consists of an Inertial Measurement Unit (IMU-IIe) based on fibre-optic gyros (FOG) and a Sensor Management Unit (SMU) with integrated high end GPS receiver. There are three different systems available with different accuracies.

AEROcontrol can be operated either as a stand-alone system or combined with other Sensor Management Units via its ethernet interface. Because of its modular design, the AEROcontrol SMU can be adapted to customer needs easily. The SMU can manage three different events (eg. trigger for camera or real-time data) and one IMU input.

AEROcontrol Benefits

The accuracy ot the AEROcontrol is sufficient for direct georeferencing for almost all aerial sensors. The obtained angular accuracy matches nicely with the "single pixel FOV" of modern digital aerial cameras and the geometrical resolution of airborne LiDAR systems.

In case the directly measured positions and orientations should be used to support an automatic aerial triangulation process, AEROoffice provides an easy interface for AT software packages. For large scale photogrammetric projects, where a higher accuracy is required, the use of AEROcontrol results as additional information for an aerial triangulation (Integrated Sensor Orientation) leads to large savings in GCP's and processing time. Together with digital imaging sensors, this ISO (Integrated Sensor Orienation) results in an optimal georeferencing result with a minimum of manual interaction.

AEROcontrol combined with CCNS4 is the standard guidance and GPS/IMU solution for the Intergraph DMC, the LiteMapper airborne LiDAR system and the StreetMapper (modified version called TERRAcontrol) mobile LiDAR system.

Depending on GPS constellation and distance from GPS Base/Monitor Station, a positioning accuracy better than 0.05m RMS and an attitude accuracy of 0.01deg RMS for heading and 0.004deg RMS for roll and pitch is achievable in post-processing.

Installation material for the IMU, including a mechanical adapter plate, is available for most common camera systems or will be custom build. The following aerial camera systems are supported:

Digital Aerial Camera Systems

Analog Aerial Camera Systems

IGI:

Complete DigiCAM camera range

Complete DigiTHERM camera range

Microsoft/Vexcel:

Complete UltraCam camera range

Intergraph:

DMC series

DiMAC Systems:

DiMAC series

Wehrli/Geosystem:

3-DAS-1

Rollei Metric:

AIC series

Jena-Optronik:

JAS 150s

Leica Geosystems:

RC10, RC10A, RC20, RC30

Carl Zeiss Jena:

LMK, LMK1000, LMK2000

Zeiss-Oberkochen/Z/I Imaging/Intergraph:

RMK-A, RMK-TOP

Precice Levelling - Get the most out of your mount!

Precise Levelling is an option for IGI's AEROcontrol system. With Precise Levelling, the mount stabilisation will be managed by the AEROcontrol system. The very accurate position and attitude data of the Inertial Measurement Unit (IMU) are used to calculate the best possible parameters for drift, roll and pitch.

In a standard operation, roll and pitch are controlled by the mount and the drift parameter is controlled by the flight guidance system through data from the directional gyro (DG) of the airplane. The accuracy of the airplane's DG and the internal roll and pitch sensors of the mount are not sufficient for today's tasks. With AEROcontrol's Precise Levelling, excellent results can be achieved.

Supported Mounts

Mount	Drift	Roll	Pitch
GSM3000	•	•	•
SSM350	•	•	•
PAV80	•	•	•
PAV30	•
Z/I Mount	•	•	•
T-AS	•
ASP-1	•	•	•

Some examples of supported mounts:

AEROoffice

AEROoffice is IGI's data handling and post-processing software for the AEROcontrol system. It provides all functions and tools necessary for processing, Exterior Orientation (EO) calculation, quality control and export of the collected GPS and IMU data.

AEROoffice contains powerful tools to

do a quick integrity check and provide a backup of the collected data directly after the flight mission.
process GPS and IMU data.
calculate the coordinate transformations to the local mapping systems.
analyse the quality of the different data sources (GPS, IMU and aerial triangulation) and of the final results.
take dynamic lever arm changes into account. (These occur during the use of stabilized sensor mounts)
export the results to different standard formats and to defined customized formats.

Features:

Integrated powerful aerial triangulation (AT) package
Forward/backward Kalman filter algorithm to achieve optimal results even under challenging conditions
Complete integration of BINGO aerial triangulation package for Integrated Sensor Orientation (ISO) and boresight calibration for Direct Georeferencing (DG) without additional aerial triangulation software
The simplified user interface allows to obtain optimal results for all users without extensive training and experience

AEROcontrol

PERFORMANCE*	AEROcontrol I**	AEROcontrol II**	AEROcontrol III
Position [m]	0.05	0.05	0.05
Velocity [m/s]	0.005	0.005	0.005
Roll / Pitch [deg]	0.008	0.004	0.003
True heading [deg]	0.015	0.01	0.007
Available data rates	128 Hz or 256 Hz	128 Hz or 256 Hz	400 Hz

* Post Processing

** Upgrades to AEROcontrol-II or -III possible at any time

AEROcontrol product photos:

AEROcontrol Sensor Management Unit - SMU	AEROcontrol SMU with IMU-IIe
IMU-IIe inside of Penta DigiCAM	IMU-IId with LiteMapper 5600 & DigiCAM
IMU-IId with GSM3000	IMU-IId mounted in UltraCam
IMU-IId mounted on LMK2000	IMU-IId mounted on PAV10
IMU-IId mounted on RMK-TOP