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en:lesson02 [2019/10/21 16:45]
golikov
en:lesson02 [2021/04/02 13:23] (current)
golikov
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-====== Tracking satellites with Orbitron ======+====== Tracking ​of satellites with the help of Orbitron ======
  
-Orbitron allows ​you to get the flight ​schedule of spacecraft.+Orbitron allows ​users to get schedule of satellite overflights.
  
 {{:​en:​image_20.png?​600|}} {{:​en:​image_20.png?​600|}}
  
-The main elements of the interface are the list of spacecraft (right), ​the image of the projections ​of the positions of the vehicles ​and orbits on +The main elements of the interface are represented by the list of spacecraft ​units (right), image of satellite location ​projections and orbits on the Earth map (top), controls (bottom) and images ​of units over the horizon ​at the bottom right. The clock and program status signals are also displayed ​in the right partThe "Main" tab contains ​the control ​boxwhere a user can select time for which the display ​shows "​currently" ​for the current time and "simulation" ​for any arbitrary time value. The latter mode makes it very convenient ​to check how a satellite ​will move across the sky during ​a certain ​session. ​A user can also choose between ​displaying ​local time and UTC (Coordinated Universal Time). It is very important that the software applies up-to-date ​data about orbit parameters. It is desirable ​to update ​such data at least once a week and before ​important ​sessions. ​In order to implement correct operation of the software ​it is necessarythat the time zone and exact time are set correctly in the computer. A user can check if the time is set correctly at https://​time.is
-Earth map (top), controls (bottom) and the image of devices above the horizon +
-bottom right. The clock and program status signals are also displayed ​on the right. ​On the bookmark +
-Main” in the control ​unityou can select ​the time for which +
-the display ​is “now”, that is, for the current timeand simulation” - that is, for any +
-arbitrary time. The latter mode allows you to very conveniently ​check how +
-the device ​will move across the sky during ​the session. ​You can also choose between +
-display of local time and UTC (single coordinated time). +
-It is very important that the program has fresh data on the parameters ​of the orbits. It is advisable ​to update ​them at least once a weekand +
-also before ​responsible ​sessions. +
-For the program to work correctly, ​it is necessary that the computer is correctly +
-set the time zone and set the exact time+
-Checking ​the correct time setting ​can be done on the site https://​time.is+
  
  
-===== Configure ​Orbitron =====+===== Orbitron ​configuration ​=====
  
-Launch the Orbitron ​program.+Carry out Orbitron ​launching. 
 +During the first launch, the software prompts a user to update the satellite position from the Internet, i.e. using the TLE data. 
 +Click the “Yes” button.
  
-At the first start, the program will offer to update from the Internet information about the location of the satellites - TLE data. 
  
-Click on the Yes button.+{{:​en:​orbitron_1.png?300|}}
  
-{{:​image001.png?​400}} +Click the button ​with a lightning bolt.
- +
-Press the zipper ​button.+
  
 {{:​en:​image_21.png?​500|}} {{:​en:​image_21.png?​500|}}
    
-Wait for the TLE to update and click OK.+Wait for TLE update ​performance ​and click OK.
  
 {{:​en:​image_22.png?​500|}} {{:​en:​image_22.png?​500|}}
  
    
-Now set the date and time format.+Set the date and time format.
  
 {{:​en:​image_23.png?​500|}} {{:​en:​image_23.png?​500|}}
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 Close the settings window. Close the settings window.
  
-When you first start the program starts ​in full screen mode. Turn it off.+The first time the software is started, it is launched ​in the full screen mode. Deactivate this mode. 
  
 {{:​en:​image_24.png?​500|}} {{:​en:​image_24.png?​500|}}
    
-Set your current location.+Select ​your current location.
  
 {{:​en:​image_25.png?​500|}} {{:​en:​image_25.png?​500|}}
    
-The exact value of your location ​can be determined ​on the map https://​www.google.com/​maps. +You can find exact coordinates ​of your location on the map at https://​www.google.com/​maps. ​Determine ​your location on the map, right-click and select ​"What's Here?" from the menu.
-Find your location on the map, right-click and select ​the “What's Here?” Drop-down ​menu.+
  
 {{:​image007.png?​200|}} {{:​image007.png?​200|}}
    
-An information window ​opens with the coordinates of this place.+An information window ​will be opened showing ​the coordinates of the location.
  
 {{:​image008.png?​400|}} {{:​image008.png?​400|}}
    
-The first number is latitudeand the second is longitude. +The first number is the latitude and the second ​number ​is the longitude. Now you need to select ​satellites we are going to monitor. We need meteorological ​satellites ​which transmit open information in the 137 MHz band. Click the Download TLE” button.
-Now you need to choose the satellites ​that we will follow. We need weather ​satellites ​that transmit open information in the 137 MHz band. +
-Click the Download TLE button.+
  
 {{:​en:​image_26.png?​200|}} {{:​en:​image_26.png?​200|}}
    
-Download the weather.txt list+Download the weather.txt list.
  
-{{:image010.png?400|}}+{{:en:​orbitron_2.png?400|}}
    
-In the side list on the right, only weather satellites will appearChoose ​Meteor-M2, NOAA15, NOAA18, NOAA19.+Only meteorological satellites will be displayed in the list on the right. ​Select ​Meteor-M2, NOAA15, NOAA18, NOAA19.
  
 {{:​image011.png?​150|}} {{:​image011.png?​150|}}
    
-The selected satellites will be shown in the main program ​window.+All selected satellites will be shown in the main software ​window.
  
 {{:​image012.png?​600|}} {{:​image012.png?​600|}}
    
-On the information tab, you can see detailed information ​on the selected satellite.+You can see the detailed information ​about the selected satellite ​on the information tab.
  
 {{:​en:​image_27.png?​500|}} {{:​en:​image_27.png?​500|}}
    
-On the Display tab, you can configure how the information is displayed.+You can adjust the way the information is displayed ​on the "​Display"​ tab.
  
 {{:​en:​image_28.png?​600|}} {{:​en:​image_28.png?​600|}}
  
-Terminator ​is the dividing ​line of day and night.+A terminator ​is line separating ​day and night.
  
-The big way is three turns (past current and next).+The trajectory of the satellite overflight contains ​three turns (pastcurrent and next).
  
-Zones are the visibility ​areas of satellites ​from the surface ​of the Earth.+The oval areas are zones of satellite ​visibility from the Earth surface
 + 
 +Proceed to the "​Calculation"​ tab and click on the appropriate button.
  
-Now go to the Calculation tab and click on the corresponding button. 
  
 {{:​en:​image_29.png?​500|}} {{:​en:​image_29.png?​500|}}
  
-The program ​will calculate the time of appearance of the satellites when they will rise higher than 10 degrees above the horizon. ​+The software ​will calculate the time of appearance of corresponding ​satelliteswhen they rise above 10 degrees above the horizon.
  
 {{:​en:​image_30.png?​500|}} {{:​en:​image_30.png?​500|}}
    
-The figure shows that the NOAA19 ​satellite will appear at a height of 10 degrees above the horizon at 15:09, at 15:14 it will reach a height ​of 40 degreesand at 15:19 it will leave its visibility ​range.+The figure shows that the satellite ​coded NOAA 19 will appear at 10 degrees above the horizon at 15:09it will reach an altitude ​of 40 degrees ​at 15:14 and at 15:19 it will leave the visibility ​zone.
  
  
 ---- ----
  
-==== Exercise. ====+==== Assignment. ====
  
-Analyze all the communication sessions ​that Orbitron ​will showFind “good” sessions ​with the satellite ​rising ​above 45 degrees above the horizon.+Analyze all communication sessions ​shown by Orbitron. ​Determine the "good" ​sessions ​when the satellite ​is above 45 degrees above the horizon.
 ---- ----
  
-===== Connect ​to SDR #=====+===== Connection ​to SDR#=====
  
-Now the most important thing is that you need to connect Orbitron ​with the SDR # program ​so that it automatically sets the desired reception frequency when a satellite appears. +Now, let's consider ​the most important thing you need to connect Orbitron ​to the SDR# software ​so that it automatically sets the desired reception frequency when a satellite appears.  
-Go to the Rotor / Radio tab, select the SDRSharp driver and click on the start tracking ​button.+Transfer ​to the "Rotor / Radio" ​tab, select the SDRSharp driverand click "​Start ​tracking".
  
-{{:image018.png?400|}}+{{:en:image_31.png?500|}}
  
-  +The recording procedure will begin!
-Note!+
  
-In the window with the receive ​frequency (Dnlink / MHz) the following correct frequencies should be set.+The following correct frequencies must be set in the window with the reception ​frequency (Dnlink / MHz).
  
 Meteor M2 - 137.10 MHz Meteor M2 - 137.10 MHz
 +
 +Meteor M2-2 - 137.10 MHz
  
 NOAA 15 - 137.62 MHz NOAA 15 - 137.62 MHz
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 NOAA 19 - 137.10 MHz NOAA 19 - 137.10 MHz
  
 +Now, when a satellite appears in the SDR# software, all information about it will appear and the receipt frequency will be set by Orbitron taking into account the Doppler effect.
  
-Now, when a satellite appears in SDR #, information about it will appear, and the reception frequency will be set from Orbitron taking into account the Doppler effect. 
  
 {{:​image019.png?​200|}} {{:​image019.png?​200|}}
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 {{:​image021.png?​100|}} {{:​image021.png?​100|}}
  
-       +When the Meteor-M2 satellite ​is registered, a special ​plugin called “Meteor Demodulator” will be activated.
-When the Meteor-M2 satellite ​appears, a special Meteor Demodulator ​plugin is activated.+
  
 {{:​image022.png?​200|}} {{:​image022.png?​200|}}
    
-special ​program ​for processing images from this satellite Meteor-M 2 LRPT Analyzer will also be launched.+The special ​software ​for processing ​of images ​received ​from the satellite, named “Meteor-M 2 LRPT Analyzer”, will also be launched.
  
 {{:​image023.png?​200|}} {{:​image023.png?​200|}}
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 ===== Doppler effect ===== ===== Doppler effect =====
  
-The Doppler effect is a physical phenomenon consisting ​in a change in the frequency of the waves depending on the movement ​of the source of these waves relative to the observer. As the source ​approaches, the frequency of the waves emitted by it increases, ​and the length ​decreases. As the wave source moves away from the observer, their frequency decreasesand the wavelength increases. +The Doppler effect is a physical phenomenon consisting ​of a change in the frequency of waves depending on motion ​of the source of these waves relative to the observer. As the source ​gets closer, the frequency of waves emitted by it is increased ​and the length ​is decreased. As the source ​of the waves moves away from the observer, their frequency decreases and their wavelength increases. ​ 
-For example, in the case of sound waves, when you remove the source, the pitch will decrease, and when approaching,​ the tone of the sound will become ​higher. ​So, by changing the pitch you can determine whether a train is approaching or moving away, a car with a special sound signal.+ 
 +For example, in case of sound waves receipt, the pitch of the sound decreases as a person moves away from the source and becomes ​higher ​as he/she gets closerThus, by changing the pitch, a user can determine whether a train, a car providing ​a special sound signal ​alarm is approaching or moving away.
  
-{{:image024.png?400|}}+{{:en:image_33.png?600|}}
    
-The same thing happens with the signal ​from the satellite. +The same happens with a satellite ​signal. When a satellite ​appears from behind ​the horizon and approaches ​a person, the frequency of the received radio signal ​is changed slightly ​and will not be exactly ​equal to 137.1 MHz rather being 0.003 MHz higher and when the satellite is moving away - it will be 0.003 MHz lower. ​Orbitron ​takes this peculiarity ​into account and sends the signal ​receipt frequency in a form corrected for reaching of the Doppler effect to the SDR# software in order to improve the quality of signal ​receipt.
-When a traveler ​appears from beyond ​the horizon and approaches ​us, the frequency of the received radio signal ​will change a little ​and will be not exactly 137.1 MHz, but 0.003 MHz higherand when the satellite is removed ​it will be 0.003 MHz lower. ​The orbitron automatically ​takes this into account and sends the frequency of signal ​reception ​corrected for the Doppler effect to SDR # to improve the quality of signal ​reception.+
  
  
en/lesson02.1571665556.txt.gz · Last modified: 2020/03/25 16:03 (external edit)