Parrot ANAFI USA RGB/Thermal Drone with Skycontroller 4

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OVERVIEW

Continuous 1x to 32x zoom

The focal leap between the wide camera (1x to 5x) and the telephoto camera (5x to 32x) is automatic, which guarantees a continuous zoom.

Optical unit

We are using low dispersion aspheric lens architectures (110° and 26° diagonal fields of view, respectively for the wide and tele lenses). The optical units are composed of six lenses optimized to minimize the level of parasitic light while providing a high-resolution image across a vast temperature range (-43 °C to 45 °C).

Diagonal (DFOV) and Horizontal (HFOV) fields of view

The lens of the wide camera covers the full diagonal of the sensor with a 110° DFOV. It brings a 69° HFOV for the standard video mode, and a 75° HFOV for the standard photo mode.

The lens of the tele camera covers the full diagonal of the sensor with a 26° DFOV. It brings a 16° HFOV for the standard video mode, and a 16° HFOV for the standard photo mode.

Lossless zoom capabilities

The conception of ANAFI USA’s optical unit enables the drone to achieve 5x lossless zoom in 4K-UHD (3840x2160 px), 10x lossless zoom in Full HD (1920x1080 px) and 15x lossless zoom in HD (1280x720 px). Finally, at 27x zoom, ANAFI USA images still reach DVD quality (720x480 px).

Angular resolution and discernable details

The angular resolution of a lens expresses the angular separation between two pixels of the associated sensor. With the angular resolution of 0.004° on its telephoto lens, ANAFI USA enables its users to discern 10 cm (about 4’’) details at a distance of 1,500 m (about 0.93 miles), or 1 cm (about 0.4’’) details at 150 m (about 164 yards).

Optical unit manufacturing: Active alignment

The optical unit is assembled with the sensor using an Active alignment technique. The optical block is positioned and held in place using a robotic arm, to achieve the following performance:

the optical block is positioned above the sensor to ensure the desired focus at a set temperature (23 °C +/- 2 °C) and to guarantee resolution specifications in the scene;

in yaw, roll and pitch, the optical block is positioned respecting the optical axis to obtain a uniform resolution on the edge of images;

the sensor is aligned with the optical block axis to get the best performance at the center of the image;

the optical center is finally aligned with the sensor center (+/- 20 pixels or 22 micrometer).

To guarantee the ISP’s image quality specifications, the factory performs an image calibration. In its internal memory, each optical unit carries the optical center, a dead pixel mapping, a lens shading mapping (luminance and color) and white balance.

Quality

• Several optical tests are performed in the course of the production process:
• MTF checks on the image center
• MTF checks on the image borders
• Camera module checks while in production:
• Center MTF
• MTF at 40 % of the field
• MTF at 70 % of the field
• Light blemishes (dark or light areas on the image, dust suspicions)
• Dead pixels (checking the total number)
• Optical center
• Uniformity of brightness and color in the field
• Cosmetic defects (stains, scratches, etc.)

Security

ANAFI USA protects the data stored on the drone or sent through the networks and protects the drone against malicious software modification attempts.

Integrity of the software and protection of the drone

ANAFI USA’s software is digitally signed, which ensures that each update comes from Parrot and has not been modified.

The access to ANAFI USA’s operating system is protected. The drone has no local nor remote access to its embedded system.

Network connections security

The network links between the drone and its controller are authenticated and cyphered with a WPA2 protection (802.11i standard). WPA2 is based on an AES CCMP encryption, including a 128 bits encryption key. AES CCMP includes a CBC-MAC mechanism which ensures the authentication and the integrity of the network’s links.

A unique encryption key is generated for each drone/controller couple. In addition, users can define their own key.

802.11 protected management frames is activated to prevent disassociation attacks, which could cause denial of service.

SD card encryption

Full disk encryption of the SD card protects the confidentiality of data stored on the drone, even if it is captured by an adverse party.

Once the encryption is activated, the videos and photos are stored in a LUKS2 volume encrypted with AES-XTS and a 512 bits key. The use of a unique identifier for each container enables the management of a fleet of SD cards which can be used on several drones.

Once the SD card is encrypted, it can never be accessed without the encryption key. The passphrase is carried by FreeFlight 6 USA and is never stored permanently on the drone, which protects from forensics analysis.

Data management

By default, ANAFI USA, the controller and FreeFlight 6 USA don’t share data to Parrot or any third party. Users can decide whether or not to activate the sharing of their flight logs to store it online, facilitate the support of his drones and help Parrot product and services improvement. To share his data anonymously or to link them to his Parrot account, the user must activate the sharing of his data, that is deactivated by default.