# How to talk to the ISS

I have a UHF/VHF transceiver capable of transmitting on UHF and receiving on VHF or vice versa on channel mode.

I finally got a directional Yagi antenna so reception/transmission shouldn't be a problem.

I live in Colorado, USA.

Which frequencies should I use to listen to it, and eventually transmit?

What other frequencies should I program in for the doppler shift? (I will be switching between channels)

• I've never done it, but check out the iss fan club frequency page issfanclub.com/frequencies – rhaig Nov 17 '13 at 5:11
• – a CVn Nov 17 '13 at 12:57

$$\begin{array}{ c r r l } \text{Channel #} & \text{Receive Frequency} & \text{Transmit Frequency} & \text{Notes} \\ 1 & 435.080\text{ MHz} & 145.9700\text{ MHz} & \text{Acquisition of signal (beginning of pass)} \\ 2 & 435.075\text{ MHz} & 145.9725\text{ MHz} & \\ 3 & 435.070\text{ MHz} & 145.9750\text{ MHz} & \text{Mid pass} \\ 4 & 435.065\text{ MHz} & 145.9775\text{ MHz} & \\ 5 & 435.060\text{ MHz} & 145.9800\text{ MHz} & \text{Loss of signal (end of pass)} \end{array}$$