UP San Francisco Bay Area Print E-mail

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(We highly recommend the Scanner Radio Pro app for Android @ $2.99 - it works better than TuneIn as it is optimized for Scanner Streams and has several useful features that TuneIn doesn't offer)


 There are 4 people listening to this channel.



(A receiver pre-amplifier has been added to improve the more distant transmissions. 

The receiver is located at the 200' level on the northern end of the SF Peninsula)



Receiver 2, Martinez Sub. AAR 46 (160.800MHz)    

  Currently not available



Welcome to the UP Bay Area stream


Union Pacific operates a myriad of trackage in the east bay portion of the San Francisco Bay Area. Directly across the bay to the east of San Francisco is the city of Oakland. Oakland is home to several freight yards, an Amtrak servicing facility, and one of the west coast's major seaports. Major revitalization of the port is underway which included the construction of the Oakland International Gateway (OIG) where BNSF intermodal trains are loaded. Access is via trackage rights over the UP's Martinez Sub from BNSF's yard in Richmond.


We're monitoring two frequencies, The first of which being AAR Ch.42 (160.740) Which is the domain of Dispatcher 58. 58's territory is Oakland south to Salinas, This includes the Niles, Oakland, Warm Springs, and Coast Subdivisions. Our reception range is south to Gilroy.

The second frequency we're listening to is AAR Ch.46 (160.800). We'll hear trains on the Martinez Sub which extends northeast from Oakland to Roseville. This is the territory of Dispatcher 62. Our listening range extends north to the San pablo area with some spotty coverage picking up again around the Fairfield/Cordelia area.

There are quite a few detectors heard on this stream. due to the overlapping milepost numbers of the various subdivisions a lower milepost number does non necessarily indicate one detector is closer than another. To help you identify which detector is where, here is a list of detectors that have been heard and their respective subdivisions.

  • 12.4 Niles Sub
  • 23.1 Niles Sub
  • 1.5 Warm Springs Sub
  • 23.2 Oakland Sub
  • 18.9 Coast Sub? **
  • 29.2 Coast Sub
  • 52.6 Coast Sub (May be heard during favorable RF conditions)
  • 67.1 Coast Sub (May be heard during favorable RF conditions)

             ** = Talk on Defect Only

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Windows Media Player



Below is a computer simulated graphical plot of maximum possible receiver coverage using the Longley-Rice Prediction Method adjusted for a very weak receive signal (.2uV for 20dB quieting) which best approximates some of the weakest signals heard from the most common distant locations.

Note: it is not unusual to hear signals outside of the red zone depicted, but those are due to non line-of-sight propagation modes which are variable and unpredictable due to weather and various secondary propagation modes such as RF Ducting, Knife-edge , and E skip (ionospheric bounce). 

Online Prediction Software provided courtesy of Communications Research Centre Canada  - An Agency of Industry Canada

 Legend for Signal Strength vs Color (Dark Blue/Grey is Strongest, Light Blue is the area for weakest signals to be received from)