Product/Service

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• SIMULTANEOUS TRACKING OF C/A, P1(Y1), AND P2(Y2) PHASE AND GROUP DELAYS FROM UP TO 8 SATELLITES
  
• SEPARATELY SETTABLE RECEIVER DELAY PARAMETERS
  
• TIME TRANSFER ACCURACY, LESS THAN 10 NANOSECONDS
  
• WIDE RANGING VAC POWER SUPPLY WITH UNINTERRUPTED SWITCH TO DC POWER SUPPLY
  
• MULTIPATH EFFECTS MINIMIZED USING ANTENNA AND INTERFEROMETRIC CHOKE-RING
  
• NO INTERCHANNEL BIAS AND LOW RECEIVER NOISE
  
• BOTH AUTOMATIC AND MANUAL TRACKING SCHEDULE GENERATION. (BIPM FORMAT)
  
• REFERENCE 1 PPS MINUS SV, GPS AND UTC SIMULTANEOUSLY REPORTED FROM UP TO 8 SATELLITES
  
• REPORTS SATELLITE VISIBILITY, AZIMUTH, ELEVATION, SV HEALTH, ALMANAC AND EPHEMERIS, IN ADDITION TO OTHER DATA TYPES
  
• ALLOWS FOR TWO SEPARATE INPUTS FROM EITHER OF TWO EXTERNAL CLOCKS (CLOCK 1 OR 2 SELECTED THROUGH SOFTWARE)
  
• IRIG B TIME CODE OUTPUT
  
• NO RECEIVER INITIALIZATION REQUIRED
  
• MEASURES 1 PPS INPUT AND PRODUCES CORRECTED 1 PPS OUTPUT
  
• CONTINUOUS LOCK ON MULTIPLE SATELLITES FOR TIME-AVERAGED 1 PPS OUTPUT
  
• INTERNAL CRYSTAL OSCILLATOR FOR STAND-ALONE OPERATION WHEN NO REFERENCE SOURCE IS AVAILABLE. INTERNAL DISCIPLINED RUBIDIUM OSCILLATOR OPTIONAL

Allen Osborne Associates, Inc (AOA) specializes in the design, analysis, development, and production of commercial and military Global Positioning System equipment (GPS) for time and frequency synchronization. Due to their high performance, reliability, and quality, more than 3,000 AOA GPS receivers can be found in leading time and frequency laboratories, such as NIST, BIPM, JPL, PTB, and also major telecommunications companies.

The Model TTR-4P GPS Time and Frequency Receiver couples the high accuracy, performance, and outputs required for precision timing applications and high-quality precision positioning accuracy of the TurboRogue geodetic GPS receivers. This receiver may be equipped with a Precise Positioning System-Security Module (PPS-SM), which allows the receiver to remove Selective Availability (SA) errors or to track Y-code when Anti-Spoofing (A-S) is enabled. TurboRogues are very versatile GPS receivers, with simultaneous and independent tracking of up to 8 satellites, delivering an unprecedented combination of accuracy and performance. Along with its processing of C/A, P1 and P2 code signals, the system can operate in a dual-frequency P-codeless mode. Precise timing is derived by the TTR-4P's ionospheric calibration capability and its precise position capability. Also, multipath effects are greatly reduced by the antenna subsystem design, incorporating a specially designed choke-ring. The TTR-4P versatility also allows its use in moving platform applications.

Allen Osborne Associates, Inc., 756 Lakefield Rd., Westlake Vill, CA 91361-2624. Tel: 805-495-8420; Fax: 805-373-6067.