| Title | Status Report : Assessment of Compatibility of Planned LightSquared Ancillary Terrestrial Component Transmissions in the 1526-1536 MHZ Band with Certified Aviation GPS Receivers |
|---|---|
| Record ID | 44302 |
| Personal Name Creator |
Huerta, Michael P. |
| Corporate Creator | United States. Department of Transportation. Federal Aviation Administration |
| Publisher | John A. Volpe National Transportation Systems Center (U.S.) |
| Publication Date | 20120127 |
| Language | English |
| Abstract | The Federal Aviation Administration (FAA) has worked with LightSquared since August 2011 to evaluate the compatibility of certified aviation receivers with the planned LightSquared ancillary terrestrial component (ATCt) network using a signal broadcast in the 1526-1536 MHz band. The assessment in this report is based on FAA performance standards. Unlike most other GPS devices, certified aviation GPS receivers have interference rejection requirements specified by the FAA and harmonized internationally. Aircraft antenna characteristics are also specified. The use of these specifications precludes the need to individually test every aviation device, and allows the assessment to be accomplished through analysis which estimates the LightSquared interference present at the aircraft GPS receiver, and then compares that level to the specified rejection limits. To predict the interference at the aircraft, the FAA has developed a set of propagation models that build upon testing conducted by the mobile satellite services and cellular communications industries for terrestrial applications. Unfortunately, aircraft operate at altitudes where no significant research on propagation has been conducted. Addressing this gap has been the primary focus of the FAA and LightSquared activities though several technical issues remain unresolved, which would require additional resources. While variations in the FAA and LightSquared models affect the scope of impact, they do not affect our fundamental conclusions. |
| Rosap ID | dot:9561 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/9561 |
| TRT Terms | Global Positioning System; Geographic information systems; Communication systems; Mobile communication systems; Satellite communication; Wireless communication systems; Broadband |
| General Subjects | Global Positioning System; Geographic information systems; Communication systems; Mobile communication systems; Satellite communication; Wireless communication systems; Broadband; LightSquared |
| Classification | NTL - GEOGRAPHIC INFORMATION SYSTEMS - GEOGRAPHIC INFORMATION SYSTEMS |
| Geographical Coverage |
United States |
| OCLC | 779194405 |
| TRIS Online Accession No |
1368817 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/44000/44300/44302/06_NTIA_Letter_Enclosure_4_-_2012_Jan_25_-_StatusReportAssessOfPlanned_LSQ_ATC_TransIn1526to1536MHz_-_FAA.pdf |
| Format | |
| Database | NTL Digital Repository |