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@ -193,11 +193,11 @@ This should work in a classroom provided there isn't too much background noise,
- It can also be useful to look at the `Ground track` (see link in top right). - It can also be useful to look at the `Ground track` (see link in top right).
1. Plan ahead and set up your ground station with time to spare before the ISS flies over. 1. Plan ahead and set up your ground station with time to spare before the ISS flies over.
1. If you are using the RTL-SDR kit antenna, please read the getting started [guide](https://www.rtl-sdr.com/using-our-new-dipole-antenna-kit/) for it. 1. If you are using the RTL-SDR kit antenna, please read the getting started [guide](https://www.rtl-sdr.com/using-our-new-dipole-antenna-kit/) for it.
- It's a good idea to adjust the length of the telescopic sections based on this dipole [calculator](http://www.csgnetwork.com/antennaedcalc.html) to match the antenna's resonant frequency to 145.8 MHz. This will help pick up weaker signals from low elevation passes. - It's a good idea to adjust the length of the telescopic arms based on this dipole [calculator](http://www.csgnetwork.com/antennaedcalc.html) to match the antenna's resonant frequency to 145.8 MHz. This will help pick up weaker signals from low elevation passes.
- Under `Desired Frequency` enter `145.8` - Under `Desired Frequency` enter `145.8`
- Under `Select Antenna Calculation` select `One Side` - Under `Select Antenna Calculation` select `One Side`
- Click `Calculate` - Click `Calculate`
- Remember there is about 2 cm of metal in each side of the antenna base. So take the calculated value and, before screwing in the telescopic sections, make them both this length minus 2 cm (excluding the screw threads). - Remember there is about 2 cm of metal in each side of the antenna base. So take the calculated value and, before screwing in the arms, make them both this length minus 2 cm (excluding the screw threads). It doesn't have to be perfect but make it as close as possible.
- To start with, deploy the dipole in a vertical v-shape and orient it with the flight path of the ISS that you find on https://www.heavens-above.com/ - To start with, deploy the dipole in a vertical v-shape and orient it with the flight path of the ISS that you find on https://www.heavens-above.com/
- Perhaps a better way of saying this is, with the dipole flat, align it with the flight path of the ISS and then bend the two arms upwards into a right-angle v-shape. - Perhaps a better way of saying this is, with the dipole flat, align it with the flight path of the ISS and then bend the two arms upwards into a right-angle v-shape.
- Antennas and their performance are sometimes a bit of an art form as opposed to an exact science. - Antennas and their performance are sometimes a bit of an art form as opposed to an exact science.