V/u - VHF Uplink or transmit and UHF Downlink or receive.  Was known as Mode J.

V/a - UHF Uplink or transmit and 10 meter Downlink or receive.
Was known as Mode A.
AO-7 is in this mode alternating with U/v every other day.

Tracking

AOS - Acquisition of Signal.  Start of the satellite pass and when the satellite comes above the horizon.

TCA - Time of Closes Approach.  Middle of the pass at the highest elevation.

LOS - Loss of Signal.  End of the pass and when the satellite goes below the horizon.

Azimuth - Measured in degrees around your QTH.  Picture a 360 degree circle with 0 degrees being due north, 270 west, 180 south and 90 east.

Elevation - Measured in degrees above the horizon a satellite is from your QTH.  0 degrees would be at the horizon and 90 is directly overhead.

Tracking programs will show the Azimuth and Elevation of the satellite through out the pass so you know where to point your antenna. When working portable this is approximate and helps to track via signal strength rather than precise azimuth and elevation. 

Keplerian
Elements

Keplerian Elements or Keps as they are called are a set of numbers that indicate the orbit of the satellites.  These must be updated on a regular basis for our tracking programs to be correct. Elements should be updated weekly at a minimum.  Update methods very between tracking programs.

Amsat Keps Tutorial

Frequency

Doppler Shift - The change in frequency of due to the speed of the satellite.  VHF usually does not need adjusted if using the FM satellites but on SSB the shift is more apparent on VHF.  UHF on average is 10 khz higher at AOS than the satellites transmit frequency, on the transmit frequency at TCA and 10 khz lower at LOS. 

Digital Amateur Radio Satellites
 

Web site with additional information on these satellites click here
IO-117 (Greencube) UHF Uplink/Downlink: 435.310 MHz Programs Needed: Greencube Terminal                                Soundmodem Great video to show setup for Icom IC-9700. This station is still experimenting with the satellite.
LEDSAT  UHF Uplink:435.310 MHZ Downlink: 435.190 MHz Programs Needed: Greencube Terminal                                Soundmodem Great video to show setup for Icom IC-9700.  Same video talks about working LEDSAT.  Same software as Greencube. This station is still experimenting with the satellite.
NO-84 (PSAT) APRS Packet VHF Up and Downlink: 145.825 MHz FM 1200 baud          Use Aliases ARISS or APRSAT It is believed that this satellite has reentered.  It has been totally removed from the NASA Bare element list. List of APRS Contacts With an APRS handheld enabled radio you can beacon though NO-84 and see yourself on pcsat.aprs.org.  You can also sent messages to station through NO-84.    ParkinsonSat (PSAT) Page

NO-104 (PSAT2) VHF Uplink/Downlink: 145.825 MHz FM APRS UHF Downlink: 437.605 MHz PSK31 and SSTV (Robot 36 Format) Telemetry: 437.605 MHz 9600 bd PSAT2 Web Site    You Tube How to on DTMF Mode    APRS DTMF Translator List of DTMF Contacts    List of APRS Contacts Note: PSAT2 is in a 28 deg inclination orbit.  Northern latitudes will see very low passes.  Highest elevation pass for me in Spokane is a maximum of almost 11 degrees on a good pass.
NO-103 (BRICSAT-2)   VHF Uplink/Downlink: 145.825 MHz FM APRS Telemetry: 437.605 MHz 9600 bd BRICSAT-22 Web Site    List of APRS Contacts Note: BRICsat-2 is in a 28 deg inclination orbit.  Northern latitudes will see very low passes.  Highest elevation pass for me in Spokane is a maximum of almost 11 degrees on a good pass.
FloripaSat-1 VBeacon: 145.900 MHz GFSK 1200 bps UHF Uplink/Downlink: 436.100 MHz GFSK 2400 bps Telemetry: 437.605 MHz 9600 bd Satellite has a UHF Digital up and downlink transponder See information here