4X4XM's Site Map

1. Homepage: Forecast HF propagation for radio amateurs
2. Site Map
3. Ham Radio Propagation Overview
4. HF Propagation FAQ
5. Index of technical terms related to skywave radio propagation
6. Prediction vs Forecast of HF Band Conditions
7. Search Terms for HF Radio Propagation
8. Understanding HF Propagation:
   Forecast, Practice, Tutorial, Apps, Tools Relaying dynamically online data

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9. Understanding HF Propagation - The latest static snapshot
10. Understanding HF Propagation - About
11. Multilanguage: multilingual presentation
12. Region vs. Layer: Earth's Atmosphere and Ionosphere
13. Webmaster: Doron, 4X4XM - Personal Bio

1. A comparison between Radio and Light propagation phenomena
2. A Quick Guide to HF Propagation Using Solar Indices
3. An introduction to HF propagation
4. Amateur Radio Propagation Today
5. Band Conditions
6. ChatGPT Compares forecasting tools for radio amateurs
7. Compare DR2W propagation tool with VOACAP
8. Current HF Propagation Conditions
9. DX Propagation Online Map
10. DX Propagation Prediction / Real-time HF Propagation Prediction
11. Forecast short wave propagation conditions
12. Forecasting propagation - tools for radio amateurs
13. Ham Radio HF Propagation Real Time
    Real-time MUF map for HF propagation predictions
14. Ham Radio Propagation Forecast
15. Ham Radio Propagation Now
16. Ham Radio Propagation: Solar Conditions
17. HF bands allocated for radio amateurs and their characteristics
18. HF Propagation
19. HF Propagation App
20. HF Propagation Calculator
21. HF Propagation Chart
22. HF Propagation Conditions - Global and Regional
23. HF Propagation Expert
24. HF Propagation Explained
25. HF propagation for beginners
26. HF Propagation for Newbees
27. HF Propagation for Newbies
28. HF propagation for radio hams
29. HF Propagation Forecast
30. HF Propagation Forecasting
31. HF Propagation Modes
32. HF Propagation Online Reports
33. HF Propagation Overview
34. HF Propagation Predictions
35. HF Propagation Prediction Online
36. HF Propagation Prediction Software
37. HF Propagation Today
38. HF Propagation Tools
39. HF Propagation Widget
40. HF Radio Propagation for Radio Amateurs
41. HF Radio Propagation Indices and Scales
42. HF Radio Propagation Tutorial for Radio Amateurs
43. HF Skywave Propagation For Radio Amateurs
44. HF Radio Propagation
45. HF Radio Propagation Today
46. Indicators of HF propagation and space weather
47. Ionosphere Radio Wave Propagation (Skywaves)
48. Live solar events and past solar activity
49. NET vs. IRI ionospheric models
50. Propagation indices
51. Propagation of high frequency radio waves | The rebirth of HF
52. Propagation of Short Radio Waves
53. Radio Communication and The Ionosphere
54. Radio Wave Propagation Forecasting
55. Real-time DX Reports * HF Propagation Prediction
56. Real-time HF Propagation Reports
57. Real-time Radio Propagation Reports
58. Real-time reports of HF propagation
59. Real-time reports of radio propagation
60. Radio wave propagation today
61. Real-time HF propagation charts
62. Real-time reports of space weather
63. Real-time space weather reports
64. Shortwave Propagation
65. Solar Activity & Ham Radio Propagation
66. Solar Conditions & Ham Radio Propagation
67. Solar Cycle Ham Radio
68. Solar Flux Today
69. Solar Storms Ham Radio
70. Space Weather Nowcast by Serge Y. Stroobandt, ON4AA, will open a new window
71. Space Weather Predictions
72. The Rebirth of Shortwave Radio Communication
73. Understanding HF propagation banners
74. Understanding HF Radio Propagation
75. Understanding LUF and MUF

1. Current HF Band Conditions Maps for Radio Operators
2. DX Propagation Map
3. DX propagation Online Map
4. HF Propagation Live Map
5. HF Propagation Map
6. HF Propagation Online Map
7. HF Propagation Status
8. Live HF Propagation Map
9. LUF Propagation Chart
10. LUF Propagation Map
11. Minimum usable frequency chart
12. MUF Propagation Map
13. MUF Propagation Map
14. MUF Propagation Online Map
15. Radio Amateurs HF Bands Charactaristics
16. Real-Time MUF Map

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

1. Benefits of the HAARP Project for Radio Hams

Shortcasts — short podcasts

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

Books and Articles

1. אטמוספירת כדור הארץ והשפעתה על התפשטות גלי רדיו - עברית
2. חיזוי התפשטות גלי רקיע - גלים בתדר גבוה (ת"ג) - חובבי רדיו - תנאי תקשורת
3. שאלות של חובב רדיו מתחיל בנושא התפשטות גלים קצרים