GTR55 - Time and frequency transfer GNSS receiver
The GTR55 is a multisystem/multifrequency GNSS (Global Navigation Satellite System) receiver intended for time and frequency transfer. The receiver supports both code and carrier phase measurements. Thanks to large receiver bandwidth and advanced signal processing, even the code measurements provide sub-nanosecond accuracy. The built-in calibrator measures continuously the internal delays of all supported signals ensuring high long-term stability. The receiver can be directly connected to a local net or internet which allows remote control and output data download and upload.
Operation
The operation is fully automatic. After the very first configuration, the receiver continuously collects the measurement data. Output files in several standard/proprietary formats can be generated from the collected data. The data processing can be started manually or by a scheduler which enables routine processing at given times (daily, weekly, ...). The resulting data files can be downloaded from the receiver, automatically uploaded to a server or automatically saved to an external disk. A brief message is sent to an e-mail address after the processing is finished. The output measurement data can be referenced to the input 1PPS and/or to the output 1PPS time mark.
Remote control
The receiver can be controlled from any computer on the net. The User Interface has the form of a web page which can be accessed using a web browser. It enables control of the receiver, monitoring of the receiver operation, and download of the measurement data. Authorization is required to access the receiver.
Diagnostic system
The diagnostic system indicates several dozens of operational events and states. The diagnostic messages can be recorded in the log, displayed in the User Interface, and sent to an e-mail address.
Monitoring with graphical representation
History of operational parameters (time difference, temperature, satellite elevation/azimuth, ...) is displayed in graphs in the User Interface.
| TIME REFERENCE INPUT | |
|---|---|
| Input signal | 1PPS (leading edge) |
| Connector type | BNC-f |
| Input impedance | 50 Ω |
| Trigger level | 0 V - 2.5 V adjustable |
| Max level | 5.5 V/50 Ω |
| Min level | -0.1 V/50 Ω |
| The 1PPS time mark must be coherent with the frequency reference at the 10 MHz input and it must be in the range UTC ± 2 ms. | |
| TIME REFERENCE OUTPUT | |
| Output signal | 1PPS (leading edge) |
| Connector type | BNC-f |
| Low level | 0 V - 0.05 V/50 Ω |
| High level | 1.8 V - 2.5 V/50 Ω |
| FREQUENCY REFERENCE INPUT | |
| Input signal | 10 MHz |
| Connector type | TNC-f |
| Input impedance | 50 Ω |
| Max level | 3 Vpp/50 Ω |
| Min level | 0.5 Vpp/50 Ω |
| PRECISION | |
| Code measurement | < 0.3 ns RMS (CGGTTS data, short-baseline common view) |
| Carrier phase measurement | < 15 ps RMS (short-baseline common view) |
| Ionospheric delay | < 2 ns RMS (CGGTTS data) |
| OUTPUT DATA FORMATS | |
| CGGTTS | all tracks/all satellites in view, version 2E, L3P data and MSIO iono-delay included |
| RINEX | observation/navigation files, versions 2.11, 3.01, 3.05 and 4.00 |
| ESA | proprietary format similar to CGGTTS/L3P with 5-minute tracks |
| BETA | proprietary format similar to CGGTTS with 5-minute tracks |
| RAW | proprietary format, all signals, both code and carrier phase data |
| 1PPS_DIF | proprietary format, REF_IN - REF_OUT time difference |
| EL_MASK | CNR analysis and search for obstacles |
| STAT | statistics of collected measurement data |
| The output measurement data can be referenced to the input 1PPS and/or to the output 1PPS time reference. | |
| GNSS RECEIVER | |
| Supported signals | |
| GPS: L1 C/A, L1P, L2C, L2P, L5, L1C | |
| GLONASS: L1OF, L1SF, L2OF, L2SF, L3OC | |
| GALILEO: E1, E5a, E5b, E5 AltBOC, E6 | |
| BeiDou: B1i, B2i, B3i, B1C, B2a, B2b, B2 ABOC | |
| SBAS: L1, L5 | |
| NAVIC: L5, S (optional feature) | |
| QZSS: L1 C/A, L1S, L1C, L2C, L5, L6 | |
| Type of measurement | code/carrier phase referenced to input/output time reference |
| Connector type | TNC-f |
| Number of satellites | all in view |
| Number of HW channels | 874 |
| Built-in calibrator measures continuously the internal delays of all supported signals including GLONASS inter-channel biases ensuring low temperature dependence and high long-term stability. | |
| Dimensions | 19“/2U standard chassis |
| Power supply | 100 V - 240 V AC/50 Hz - 60 Hz |
| Operating temperature | 0 ºC to +50 ºC |
| ANTENNA | |
| Antenna supply | 5 V/up to 120 mA (plus on inner contact) |
| Recommended antenna | Novatel GNSS-850 (all signals except NAVIC-S supported) |
| Javad GrAnt-G5T-Lb-i (all signals including NAVIC-S supported) | |
| Optional amplifier supply | 12 V/up to 90 mA |
| GTR55 operating instructions | 2065.010.32 |
|---|
GTR55 - Time and frequency transfer GNSS receiver set
Set consists of GTR55 receiver (2065.100.30) and accessories. The GTR55 is a multisystem/multifrequency GNSS (Global Navigation Satellite...
| Type designation | Name | PN (RN) | KCM | NSN |
|---|---|---|---|---|
| GTR55 | Time and frequency transfer GNSS receiver set | 2065.000.30 |
