Although many satellite images are captured with little or tolerable degradation, due to the effects of near band or in band pager interference, some images are more badly affected. This image received from Meteor M2, June 20 2017, orbit number 15301, 11:00 hours, 137.900 MHz, shows the effect of both in band and near band data transmissions from local, ( Oxford, UK ) high power pager style systems.
Update 13-02-2019: Orbitron doesn’t seem to work well unless you run it as admin – it can’t save files to its install dir and won’t pick up config changes. One work-around may be a custom install location.
Don’t directly run the exe, you have to launch it from Orbtron itself by going to the rotor/radio tab, selecting the correct DDE driver, in this case it’s DDEOrbitronToSerial. Then click the button to the right of the dropdown to start sending data and launch the application:
The DDEOrbitronToSerial application should now launch and you will be able to select your COM port and output the satellite data to the serial port.
NB: You can edit additional options such as com port baud rate in the config file by clicking the open config button.
Any bug reports or feature requests are welcome!
June 2019 – Added latest release with a bug fix:
FIXED: Certain USB to serial chips would only receive a few characters.
Project: Adjustable frequency dual AD9850 DDS units with output adjustable phase from 0 to 180 degrees in 11.25 phase increments.
-Arduino Uno R3
-2x 9850 DDS units
-Arduino software written in Arduino IDE version 1.6.8
-Computer running serial terminal client software to send commands over serial port
The AD9850 has five bits that control the phase allowing for 11.25 (360/32) degree phase adjustment resolution.
The original code provides a way to adjust frequency while keeping a constant phase difference of 90 degrees.
The modified code gives finer phase adjustment in 11.25 degree increments from 0 to 180 degrees.
The menu of commands is sent to the serial terminal software when the Arduino is powered on:
as DDS A sine o/p
ac DDS A cos o/p
bs DDS B sine o/p
bc DDS B cos o/p
To adjust phase type b0000, b1125, b…, b16875, b18000
To set DDSB 90 behind DDSA: set as and bc
To set DDSB 90 ahead of DDSA: set as and b18000
To set DDSB 45 ahead of DDSA: set as and b4500
To setup DDSB 45 behind DDSA: setup as and b13500
To setup DDSB 11.25 behind DDSA: setup as and b7875
To setup DDSB 11.25 ahead of DDSA: setup as and b10125
phase is adjustable by 11.25 degrees from 0 to 180 degrees
Set ac and bc for 180 degrees out of phase. as and bs for in phase
pins list pins
When unit powers on DDSB lags DDSA by 90 degrees