A method for forming 3D image data representative of the subsurface of infrastructure located in the vicinity of a moving vehicle. The method includes: rotating a directional antenna, mounted to the moving vehicle, about an antenna rotation axis; performing, using the directional antenna whilst it is rotated about the antenna rotation axis, a plurality of collection cycles in which the directional antenna emits RF energy and receives reflected RF energy; collecting, during each of the plurality of collection cycles performed by the directional antenna.

The present disclosure relates to a service station that is transportable over a predetermined roadway or by water. The service station has a base having a stern, bow, and two lateral sides. The base is configured to displace a volume of water so as to render the service station buoyant. A tank is disposed on the base and is configured to contain fuel. The tank is configured to comply with U.S. Government requirements for transportation of fuel over roadways. A pump is disposed on the base, and is configured to dispense liquid fuel to supply vehicles. An axle assembly is coupled to the base and has at least one wheel, the at least one wheel and axle assembly moveable between an engaged position and a stored position. The least one wheel is in contact with a surface and partially supports the base over the surface in an engaged position.

A communication system for a vehicle includes a transceiver and a telematics control module. The transceiver receives data from a network device using first antennas disposed external to a vehicle and second antennas disposed internal to the vehicle. The transceiver receives the data using a first antenna combination including two antennas, which include one or more of the first antennas or one or more of the second antennas. The telematics control module: reads channel state information including reference signal received power (RSRP) and rank indicator (RI) values; determines if the RSRP value is greater than a threshold value and the RI value is less than a minimum number of antennas being used to transfer the data; and based on the first RSRP value being greater than the threshold value and the RI value being less than the number of antennas, switches from the first to a second antenna combination.

Embodiments of the present invention relate to the communications field and disclose a data transmission device, method, and system, so as to better improve an average downlink throughput of UE. A specific solution is: A determining unit determines a downlink frequency shift according to a received uplink signal sent by a terminal device, and determines a second transmit frequency according to the downlink frequency shift and a first transmit frequency; and a sending unit sends a downlink signal to the terminal device according to the second transmit frequency determined by the determining unit, so that the terminal device receives the downlink signal according to a receive frequency corresponding to the first transmit frequency, where the downlink signal includes at least one of a DMRS or downlink data. The present invention is applied in a data transmission process.

Antenna (1) for railway vehicles comprising: a plurality of photonic band gaps PGB cells (2), placed adjacent each other and made of a layer of low dielectric properties material placed on a metal ground plane (4), wherein each photonic band gap cell (2) form a reflector (6) of the antenna (1); a plurality of first metallic bars (8), placed on top of the PBG cells (2); a plurality of second metallic bars (10), each embedded, at least partially, in the thickness of the low dielectric properties material;
wherein the second metallic bars (10) are each roughly perpendicular to the respective reflector (6).

A method for forming 3D image data representative of the subsurface of infrastructure located in the vicinity of a moving vehicle. The method includes: rotating a directional antenna, mounted to the moving vehicle, about an antenna rotation axis; performing, using the directional antenna whilst it is rotated about the antenna rotation axis, a plurality of collection cycles in which the directional antenna emits RF energy and receives reflected RF energy; collecting, during each of the plurality of collection cycles performed by the directional antenna.

A mobile tower system includes a tower cassette sized to be accommodated in a bed of a pickup truck. The tower cassette includes a container, a tower vertically fixed to a back portion of the container, and a mounting member fixed to a top of the tower. The mounting member has a free end for mounting a piece of equipment thereto, and the mounting member is moveable between a stowed position and a use position. When in the stowed position, the free end of the mounting member is disposed inside of the container for securing the piece of equipment mounted thereto in the container when the tower is not in use. When in the use position, the free end of the mounting member is disposed outside of the container for operating the piece of equipment when the tower is in use.

Disclosed is an antenna for railway vehicles including: a plurality of photonic band gaps PGB cells, placed adjacent each other and made of a layer of low dielectric properties material placed on a metal ground plane, wherein each photonic band gap cell form a reflector of the antenna; a plurality of first metallic bars, placed on top of the PBG cells; and a plurality of second metallic bars, each embedded, at least partially, in the thickness of the low dielectric properties material. The second metallic bars are each roughly perpendicular to the respective reflector.

Systems and methods are provided for performing alignment calibration of an RF antenna in satellite communications. Data is received that is representative of inertial navigation system and gimbal angle measurement signals. The received data is collected while a vehicle is operated in a reduced yaw motion and while the RF antenna is tracking a satellite. Equations are used that describe a mathematical relationship among the misalignments, offsets, and latency mismatch to the antenna gimbal control servo measurements. Estimates are generated for certain errors involved in the alignment process. The generated estimates are provided for pointing the RF antenna.

A stabilization arrangement (10) for stabilizing an antenna mast (3), comprising an antenna mast (3) and a gyroscopic stabilizer device (12), wherein the gyroscopic stabilizer device (12) in turn comprises a flywheel (11), a flywheel axis (14), wherein the flywheel (11) is arranged about the flywheel axis (14), and a gimbal structure (13), wherein the flywheel (11) is suspended in the gimbal structure (13) and the gimbal structure (13) is configured to permit flywheel precession or tilting about at least one gimbal output axis (16). The gyroscopic stabilizer device (12) is fixedly arranged in connection to a first end portion (31) of the antenna mast (3) and the antenna mast (3) is fastenable to a supporting structure at a second end portion (32) of the antenna mast (3), wherein the gyroscopic stabilizer device (12) is configured to reduce movements in a plane perpendicular to the extension of the antenna mast (3).