Site Map

https://www.qsl.net/4x4xm
Updated: 2024, June 1
  1. 4X4XM, Doron Tal - Personal Bio
  2. 4x4XM's Site Map — HF propagation for Radio Amateurs
  3. Forecast HF Propagation for Radio Amateurs
  4. Ham Radio Range Guide: How Far Can You Talk?
  5. Understanding HF Propagation: Forecast, Practice, Tutorial, Apps, Tools Dynamical online data
  6. Understanding HF Propagation - The latest static snapshot
  7. Understanding HF Propagation - About
  8. Ham Radio Propagation Overview
  9. Search Terms for HF Radio Propagation
  10. Index of technical terms related to skywave radio propagation
Propagation
  1. A Quick Guide to HF Propagation Using Solar Indices
  2. A comparison between Radio and Light propagation phenomena
  3. Amateur Radio Propagation Today
  4. An introduction to HF propagation
  5. Band Conditions
  6. Blackout of HF communication
  7. Compare DR2W propagation tool with VOACAP
  8. Current HF Bands Conditions Charts for Radio Hams
  9. Current HF Propagation Conditions
  10. Current Ham Radio Propagation Chart
  11. Current Ham Radio Propagation Conditions
  12. Current Ham Radio Propagation
  13. Current Shortwave Propagation Conditions
  14. Current Solar Events and Past Solar Activity
  15. DX Propagation Online Map
  16. DX Propagation Map
  17. Forecast Shortwave Propagation Conditions
  18. Forecasting tools for HF radio propagation
  19. Geomagnetic Storms
  20. Global-and-Regional-HF-propagation-Conditions.htm
  21. HF Propagation Conditions - Global versus Regional
  22. HF Propagation App
  23. HF Propagation Calculator
  24. HF Propagation Expert
  25. HF Propagation Explained
  26. HF Propagation Forecast
  27. HF Propagation Live Map
  28. HF Propagation Modes
  29. HF Propagation Online Reports
  30. HF Propagation Overview
  31. HF Propagation Overview
  32. HF Propagation Prediction Online
  33. HF Propagation Prediction Software
  34. HF Propagation Prediction
  35. HF Propagation Today
  36. HF Propagation Tools
  37. HF Propagation Widget
  38. HF Propagation Forecasting
  39. HF Propagation
  40. HF Propagation for Newbees
  41. HF Propagation for Newbies
  42. HF Propagation Indices
  43. HF Radio Propagation Chart
  44. HF Radio Propagation Today
  45. HF Radio Propagation
  46. HF Radio Propagation Tutorial
  47. HF bands allocated for radio amateurs and their characteristics
  48. HF propagation Online Map
  49. HF propagation map
  50. HF propagation for beginners
  51. HF propagation for radio hams
  52. HF radio propagation for radio amateurs
  53. HF radio propagation index
  54. Ham Radio HF Propagation real-time map
  55. Ham Radio Propagation Forecast
  56. Ham Radio Propagation Now
  57. Ham Radio Propagation Overview
  58. Ham Radio Propagation: Solar Conditions
  59. Ham band condition for beginners
  60. Ham-radio-propagation-forecast.htm
  61. Index of /4/4x4xm//Propagation
  62. Index of terms related to HF radio propagation
  63. Indicators of HF propagation and space weather
  64. LUF Propagation Chart
  65. LUF Propagation Map
  66. Live HF Propagation Chart / Map
  67. MUF Propagation Map
  68. MUF indices
  69. MUF indictors
  70. MUF propagation Online Map
  71. Minimum usable frequency chart
  72. NET vs. IRI ionospheric models
  73. Propagation of high frequency radio waves | The rebirth of HF
  74. Radio Communication and the Ionosphere
  75. Radio Propagation Forecast
  76. Radio Propagation Forecasting
  77. Radio Wave Propagation Forecasting
  78. Radio Wave Propagation Today
  79. Radio-Frequency-Propagation-for-Ham-Radio.htm
  80. Real-time DX Reports * HF Propagation Prediction
  81. Real-time HF Propagation Charts
  82. Real-time HF Propagation Reports
  83. Real-time MUF Map
  84. Real-time Space Weather Reports
  85. Reports, Indices and Scales for HF Radio Propagation
  86. Shortwave Propagation
  87. Shortwave Radio Propagation Today
  88. Skywave concept
  89. Skywave Propagation for Radio Amateurs
  90. Solar Activity & Ham Radio Propagation
  91. Solar Conditions & Ham Radio Propagation
  92. Solar cycle ham radio
  93. Solar storms ham radio
  94. Space Weather Predictions
  95. Space Weather Nowcast by Serge Y. Stroobandt, ON4AA, will open a new window
  96. The Ionosphere and Skywave Propagation
  97. The Rebirth of Shortwave Radio Communication
  98. The Solar Flux Today
  99. Tools for Forecasting and Predicting HF Propagation Conditions for Radio Amateurs
  100. Types of radio wave propagation
  101. Understanding Skywave Propagation
  102. Understanding HF Propagation - Review.pdf
  103. Understanding-HF-Propagation-Review.pdf
  104. Understanding HF Radio Propagation
  105. Understanding HF propagation banners
  106. Understanding LUF and MUF
  107. hf propagation app
  108. hf propagation calculator
  109. hf propagation chart
  110. hf propagation explained
  111. hf propagation forecast.htm
  112. hf propagation map
  113. hf propagation prediction online
  114. hf propagation prediction software
  115. hf propagation today
  116. hf-propagation-widget.htm
  117. real-time-hf-propagation-map.htm
  118. real-time-ionosphere-map.htm
  119. understanding NVIS
  120. understanding hf radio
  121. Which ham band is open now?
  122. Which ham bands are open now?
FAQ
  1. At-what-Kp-index-can-I-see-aurora.pdf
  2. Can HF Radio Propagation be predicted?
  3. How Can We Forecast HF Propagation Conditions?
  4. Global vs Regional HF propagation-Conditions
  5. How do solar flares cause geomagnetic storms
  6. How do the seasons affect HF radio propagation?
  7. How does the ionosphere affect HF Radio Propagation?
  8. HF Radio Propagation FAQ FAQ directory
  9. HF Propagation FAQ Root directory
  10. What are Band Conditions Banners?
  11. What are electromagnetic waves?
  12. What are Geomagnetic Disturbances?
  13. What are Geomagnetic Storms?
  14. What are HF band conditions?
  15. What are ionospheric clouds?
  16. What are ionospheric conditions?
  17. What are ionospheric storms?
  18. What are propagation indices?
  19. What are Radio Blackouts?
  20. What are Radio Waves?
  21. What are Solar Flares?
  22. What are Solar Storms? How they induce Geomagnetic Storms?
  23. What are Sunspots?
  24. What are the current HF propagation condition?
  25. What are the modes of HF Radio Propagation?
  26. What are the modes of Radio Propagation?
  27. What are the Solar Indices?
  28. Why does space weather affect ham radio?
  29. Blackout of HF communication
  30. Compare-DR2W-propagation-tool-with-VOACAP.htm
  31. Compare-HF-Propagation-Solar-Geomagnetic-Space-weather-indices.htm
  32. Compare-forecasting-tools-for-HF-radio-propagation.htm
  33. Compare-forecasting-tools-for-radio-amateurs.htm
  34. Forecasting-tools-for-radio-amateurs.htm
  35. Geomagnetic-Storms.html
  36. Global-and-Regional-HF-propagation-Conditions.htm
  37. HF-radio-propagation-for-radio-amateurs.htm
  38. How-do-solar-storms-cause-geomagnetic-storms.htm
  39. Live-Solar-Events_Past-Solar-Activity.htm
  40. What-are-the-most-common-modes-of-HF-Radio-Propagation.htm
  41. What causes HF propagation?
  42. What causes ionospheric ionization?
  43. What causes geomagnetic storms?
  44. What factors influence HF Radio Propagation?
  45. What is the current minimum usable frequency (LUF)?
  46. What is the Current Minimum Usable Frequency?
  47. What is The Magnetic Field Of Earth?
  48. What is Earth's Magnetosphere?
  49. What is Geomagnetic Activity?
  50. What is a Geomagnetic Disturbance?
  51. What is a Geomagnetic Storm?
  52. What is Greyline propagation?
  53. What is HF Propagation?
  54. HF Radio Propagation Conditions
  55. What is HF Radio Propagation Prediction?
  56. What is HF Radio Propagation?
  57. What is HF Wave Propagation?
  58. What is ionization, in the context of HF radio wave propagation?
  59. What is LUF?
  60. What is MUF? How to predict MUF?
  61. What is NVIS? » Real-time NVIS Propagation Map
  62. What is Radio Propagation?
  63. What is Sky Wave Propagation?
  64. What is Skywave Propagation?
  65. What is Solar Activity?
  66. What is Solar Wind?
  67. What is Space Weather?
  68. What is Total Electron Content?
  69. What is the Current Maximum Usable Frequency (MUF)?
  70. What-is-earth's-magnetosphere.htm
  71. What is Ham Radio Propagation?
  72. What is plasma?
  73. What is the solar flux index?
  74. Global and Regional HF propgation conditions
  75. What-is-the-difference-between-earth's-magnetosphere-and-earth's-magnetic-field.htm
  76. What is the difference between The Magnetosphere and Earth's magnetic field?
  77. What is the difference between geomagnetic and ionospheric storms?
  78. What is the difference between solar indices and propagation indices?
  79. What is the difference between solar proton flux and solar proton density?
  80. What is the difference between the Greyline and the Solar Terminator?
  81. Why is HF used for long range communication?
  82. hf-propagation-app.htm
  83. hf-propagation-calculator.htm
  84. hf-propagation-chart.htm
  85. hf-propagation-explained.htm
  86. hf-propagation-forecast.htm
  87. hf-propagation-map.htm
  88. hf-propagation-prediction-online.htm
  89. hf-propagation-prediction-software.htm
  90. hf-propagation-today.htm
  91. hf-propagation-widget.htm
  92. real-time-hf-propagation-map.htm
  93. real-time-ionosphere-map.htm
  94. understanding-NVIS.htm
  95. understanding-hf-radio.htm

Books and Articles

  1. A Primer on Space Weather
  2. An Introduction to Ionosphere and Magnetosphere(Abstract)
  3. Australian Space Weather Alert System (2024)
  4. Basic Wave Propagation, Nor Hadzfizah Binti Mohd Radi (2017)
  5. Comparing Ionospheric MUF using IRI16 Model with Mid Latitude (2020)
  6. Correlation Between The Sunspot Numbers and Geomagnetic Parameters for The Solar Cycle 24
  7. Correlation analysis of Solar activity and Cosmic ray (J_Phys_Conf 2017)
  8. Correlation of Sunspot Numbers and Geomagnetic Indices with Various Climate Change Parameters (2024)
  9. Critique of IONCAP's Reliability and Service Probability Calculations (1993)
  10. Detection and Localization of F-layer Ionospheric Irregularities (2022)
  11. Equatorial Spread-F Ionospheric dynamics (1962)
  12. Geomagnetic storm and equatorial spread-F (2004)
  13. HamSCI Space Weather Operational Resources and Needs of the Amateur Radio Community (2020)
  14. Introduction to HF Radio Propagation Australian Gov (2002)
  15. Introduction to-HF Radio Propagation Australian Gov (2007)
  16. Ionospheric Propagation, Prof. Sean Victor Hum (2018)
  17. Ionospheric Radio Propagation, Kenneth Davies (1965)
  18. John Ashworth Aatcliffe (12-December-1902-25-October 1987)
  19. Modeling the Topside Ionosphere Observations by Satellites (2003)
  20. NM7M’s-HF-Propagation-tutorial-2015-by-Thierry-Lombry,-LX4SKY (txt file)
  21. NM7M HF Propagation tutorial
  22. NVIS: Stephen C. Finch AI0W (2008)
  23. Propagation Modes, Ken Larson, KJ6RZ (2024)
  24. Propogation and RadioScience, KL7AL (ARRL 2005)
  25. Radio Wave Propagation part-1 Introduction, Marcel H. De-Canck, ON5AU (2002)
  26. Radio Waves and the Ionosphere, G3YWX (QST 1999)
  27. Solar UV and X-ray spectral diagnostics (2018)
  28. Space weather effects on communications systems (June 2020)
  29. Stanley article of the month (QST-June-2021)
  30. The Big Gun`s Guide to Low Band Propagation: A book by NM7M (2002)
  31. The Little Pistol's Guide to HF Propagation Robert R. Brown, Worldradio Books (1996)
  32. Understanding LF and HF propagation, G0KYA, G3NYK, RSGB (2010)
  33. Understanding Propagation: Paul L. Herrman, N0NBH (11-July 2010)
  34. Understanding Propagation WB5ANN.pdf
עברית Hebrew
  1. אטמוספירת כדור הארץ והשפעתה על התפשטות גלי רדיו
  2. חיזוי התפשטות גלי רקיע - גלים בתדר גבוה (ת"ג) - חובבי רדיו - תנאי תקשורת
  3. חיזוי התפשטות גלי רקיע - גלים בתדר גבוה (ת"ג) - חובבי רדיו - תנאי תקשורת pdf
  4. שאלות של חובב רדיו מתחיל בנושא התפשטות גלים קצרים
ChatGPT
  1. ChatGPT "failure" helped a Radio Amateur, 13-April-2023
  2. ChatGPT suggested updates for this website 15-April-2023
  3. ChatGPT response: webpage fixed; 18-April-2023
  4. ChatGPT learns about forecasting tools for radio amateurs
HAARP
  1. Benefits of the HAARP Project for Radio Hams
Languages
  1. التنبؤ بظروف الاتصال لهواة الراديو
  2. 预测无线电爱好者的通信条件 - 无线电波传播
  3. Voorspelling van communicatievoorwaarden voor radioamateurs
  4. Prévision des conditions de communication pour les radioamateurs
  5. Vorhersage der Kommunikationsbedingungen für Funkamateure
  6. रेडियो शौकीनों के लिए संचार स्थितियों का पूर्वानुमान लहर प्रसार
  7. Previsione delle condizioni di comunicazione per radioamatori
  8. アマチュア無線家の通信状況を予測する
  9. 아마추어 무선 통신 조건 예측
  10. Previsão de condições de comunicação para radioamadores
  11. Predicción de las condiciones de comunicación para radioaficionados
  12. Прогнозирование условий связи для радиолюбителей распространение волн
Shortcasts
  1. Index of 4x4xm's Shortcasts
  2. Aurora Propagation MP3 Sound
  3. Backscatter Radio Propagation MP3 Sound
  4. Field-Aligned Irregularities Propagation MP3 Sound
  5. HF skywave propagation for amateur radio MP3 Sound 9 minutes
  6. HF skywave propagation for amateur radio MP4 Video 9 minutes
  7. HF skywave propagation for amateur radio Script
  8. Ionospheric Regions Solar Index Skywave Propagation MP3 Sound
  9. Meteor Scatter Radio Propagation MP3 Sound
  10. Propagation Modes Review MP3 Sound
  11. Propagation of radio waves explained MP3 Sound
  12. Propagation of radio waves summary MP3 Sound
  13. Solar activity and tools for radio hams MP4 Video 6 minutes
  14. Sporadic E Propagation MP3 Sound
  15. The fascinating world of HF skywave propagation
  16. Transequatorial Propagation MP3 Sound
  17. What Are Radio Waves? MP3 Sound