Base Height of F-region during 2003 - 2004 Metadata

Virtual base height of F-region (h′F) from 17.5 h to 21 hrs on during the year 2003-2004                              
                               
                               
%Day 17.5 17.75 18 18.25 18.5 18.75 19 19.25 19.5 19.75 20 20.25 20.5 20.75 21
1 266.1 275 283.9 296.4 326.8 364.3 394.6 407.1 410.7 414.3 419.6 403.6 396.4 389.3 385.7
2 266.1 269.6 278.6 292.9 316.1 337.5 360.7 358.9 360.7 369.6 383.9 396.4 398.2 389.3 380.4
3 257.1 258.9 269.6 285.7 308.9 342.9 371.4 375 385.7 387.5 394.6 400 396.4 400 410.7
4 255.4 258.9 262.5 275 289.3 307.1 323.2 326.8 323.2 316.1 310.7 316.1 323.2 319.6 314.3
5 257.1 260.7 267.9 267.9 275 285.7 292.9 280.4 262.5 258.9 258.9 266.1 262.5 266.1 260.7
6 248.2 260.7 266.1 273.2 276.8 275 273.2 266.1 260.7 255.4 253.6 248.2 244.6 242.9 239.3
7 248.2 257.1 260.7 266.1 273.2 278.6 276.8 275 269.6 269.6 273.2 266.1 264.3 271.4 267.9
8 250 255.4 260.7 260.7 255.4 253.6 258.9 262.5 260.7 255.4 251.8 244.6 239.3 235.7 230.4
9 246.4 248.2 248.2 251.8 253.6 255.4 260.7 248.2 241.1 233.9 235.7 230.4 225 223.2 225
10 269.6 278.6 271.4 275 275 278.6 280.4 278.6 275 269.6 264.3 255.4 255.4 251.8 250
11 251.8 258.9 257.1 258.9 257.1 260.7 258.9 251.8 255.4 258.9 250 241.1 225 217.9 223.2
12 244.6 251.8 253.6 253.6 255.4 257.1 258.9 262.5 264.3 255.4 258.9 250 251.8 253.6 250
13 251.8 258.9 260.7 257.1 260.7 266.1 269.6 273.2 280.4 278.6 275 271.4 260.7 253.6 248.2
14 244.6 248.2 255.4 260.7 266.1 278.6 294.6 312.5 319.6 323.2 325 308.9 296.4 292.9 289.3
15 248.2 260.7 267.9 273.2 282.1 292.9 305.4 317.9 321.4 326.8 312.5 294.6 276.8 260.7 250
16 248.2 257.1 260.7 273.2 276.8 280.4 276.8 273.2 276.8 273.2 262.5 258.9 251.8 248.2 242.9
17 253.6 260.7 264.3 278.6 289.3 308.9 323.2 325 369.6 373.2 371.4 366.1 353.6 351.8 342.9
18 250 260.7 266.1 273.2 283.9 298.2 319.6 333.9 339.3 341.1 333.9 321.4 307.1 296.4 280.4
19 250 255.4 264.3 266.1 267.9 276.8 285.7 298.2 312.5 325 335.7 330.4 330.4 323.2 341.1
20 250 257.1 260.7 260.7 260.7 260.7 262.5 266.1 267.9 273.2 276.8 282.1 275 282.1 283.9
21 257.1 258.9 264.3 267.9 273.2 275 276.8 273.2 271.4 269.6 266.1 266.1 264.3 273.2 273.2
22 253.6 260.7 264.3 269.6 269.6 273.2 276.8 282.1 285.7 289.3 298.2 308.9 312.5 325 337.5
23 251.8 260.7 264.3 273.2 285.7 308.9 323.2 339.3 362.5 375 387.5 401.8 408.9 412.5 408.9
24 251.8 260.7 264.3 273.2 285.7 308.9 323.2 339.3 362.5 375 387.5 401.8 408.9 412.5 408.9
24 NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN
25 NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN
26 NaN NaN NaN NaN 280.4 285.7 296.4 300 305.4 319.6 325 325 316.1 292.9 271.4
27 248.2 253.6 264.3 258.9 262.5 NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN
28 251.8 260.7 264.3 273.2 275 282.1 287.5 291.1 294.6 296.4 298.2 292.9 291.1 285.7 275
29 251.8 260.7 264.3 267.9 276.8 289.3 303.6 314.3 330.4 337.5 350 351.8 353.6 353.6 348.2
30 266.1 257.1 260.7 267.9 271.4 278.6 283.9 282.1 275 266.1 266.1 258.9 250 239.3 233.9
31 244.6 250 258.9 262.5 260.7 257.1 248.2 244.6 248.2 248.2 241.1 235.7 235.7 232.1 219.6
32 250 257.1 260.7 260.7 269.6 283.9 303.6 317.9 300 280.4 267.9 264.3 250 235.7 233.9
33 248.2 258.9 258.9 266.1 267.9 276.8 283.9 291.1 308.9 307.1 307.1 303.6 300 300 303.6
34 251.8 258.9 257.1 257.1 258.9 257.1 260.7 260.7 258.9 283.9 264.3 258.9 255.4 246.4 239.3
35 250 260.7 260.7 273.2 278.6 287.5 291.1 300 303.6 300 289.3 280.4 276.8 269.6 271.4
36 248.2 250 255.4 262.5 266.1 280.4 301.8 321.4 339.3 353.6 364.3 375 385.7 385.7 389.3
37 250 257.1 258.9 271.4 278.6 294.6 308.9 321.4 316.1 314.3 310.7 301.8 282.1 271.4 273.2
38 258.9 258.9 262.5 266.1 271.4 278.6 292.9 308.9 323.2 341.1 353.6 367.9 378.6 380.4 364.3
39 237.5 246.4 246.4 251.8 257.1 266.1 269.6 266.1 266.1 257.1 262.5 267.9 264.3 260.7 251.8
40 239.3 248.2 253.6 255.4 260.7 273.2 283.9 287.5 287.5 292.9 307.1 314.3 319.6 323.2 317.9
41 239.3 250 260.7 262.5 264.3 262.5 262.5 266.1 262.5 262.5 260.7 260.7 267.9 262.5 257.1
42 237.5 248.2 251.8 253.6 251.8 246.4 242.9 246.4 251.8 264.3 266.1 269.6 266.1 264.3 260.7
43 239.3 250 262.5 262.5 271.4 267.9 262.5 262.5 253.6 253.6 251.8 248.2 248.2 248.2 246.4
44 235.7 246.4 258.9 266.1 275 275 285.7 294.6 298.2 303.6 305.4 308.9 321.4 321.4 316.1
45 244.6 248.2 255.4 258.9 262.5 269.6 276.8 287.5 298.2 303.6 310.7 323.2 323.2 319.6 308.9
46 244.6 250 258.9 266.1 275 283.9 294.6 300 300 314.3 332.1 346.4 357.1 380.4 385.7
47 248.2 250 258.9 271.4 273.2 280.4 282.1 285.7 282.1 278.6 282.1 273.2 262.5 248.2 239.3
48 246.4 253.6 260.7 267.9 276.8 285.7 300 310.7 330.4 339.3 346.4 355.4 360.7 364.3 364.3
49 NaN 248.2 255.4 260.7 266.1 267.9 275 285.7 291.1 294.6 291.1 287.5 282.1 276.8 267.9
50 241.1 246.4 255.4 262.5 267.9 275 294.6 317.9 337.5 346.4 364.3 375 398.2 400 405.4
51 239.3 250 253.6 260.7 271.4 283.9 307.1 321.4 333.9 346.4 348.2 357.1 373.2 394.6 376.8
52 242.9 255.4 257.1 262.5 271.4 291.1 323.2 355.4 380.4 385.7 398.2 389.3 378.6 342.9 332.1
53 253.6 253.6 257.1 260.7 264.3 264.3 257.1 244.6 237.5 237.5 228.6 221.4 216.1 217.9 212.5
54 242.9 248.2 255.4 260.7 267.9 273.2 278.6 280.4 276.8 273.2 266.1 251.8 248.2 244.6 244.6
55 239.3 248.2 253.6 257.1 266.1 269.6 271.4 271.4 269.6 266.1 260.7 257.1 255.4 248.2 242.9
56 241.1 242.9 255.4 260.7 262.5 264.3 267.9 273.2 267.9 264.3 262.5 258.9 258.9 255.4 246.4
57 248.2 248.2 257.1 260.7 258.9 260.7 262.5 258.9 264.3 267.9 258.9 258.9 242.9 241.1 233.9
58 237.5 244.6 255.4 258.9 262.5 266.1 278.6 289.3 294.6 303.6 308.9 305.4 300 294.6 289.3
59 237.5 244.6 248.2 255.4 258.9 260.7 266.1 273.2 276.8 285.7 298.2 298.2 298.2 298.2 289.3
60 232.1 235.7 241.1 251.8 260.7 262.5 264.3 271.4 271.4 273.2 271.4 266.1 260.7 255.4 250
61 230.4 242.9 248.2 253.6 257.1 262.5 267.9 278.6 283.9 292.9 291.1 287.5 292.9 291.1 283.9
62 235.7 242.9 244.6 251.8 251.8 246.4 242.9 246.4 255.4 266.1 262.5 266.1 262.5 260.7 257.1
63 235.7 237.5 246.4 248.2 251.8 255.4 260.7 264.3 271.4 287.5 287.5 285.7 298.2 298.2 282.1
64 235.7 248.2 246.4 257.1 264.3 276.8 296.4 332.1 353.6 367.9 371.4 350 325 301.8 294.6
65 241.1 244.6 250 255.4 262.5 269.6 282.1 285.7 289.3 287.5 280.4 273.2 267.9 266.1 273.2
66 235.7 235.7 241.1 250 248.2 248.2 257.1 255.4 255.4 257.1 257.1 264.3 271.4 271.4 262.5
67 230.4 246.4 248.2 253.6 262.5 262.5 269.6 276.8 294.6 298.2 298.2 298.2 303.6 298.2 298.2
68 226.8 239.3 241.1 250 255.4 257.1 260.7 260.7 264.3 273.2 278.6 282.1 273.2 271.4 264.3
69 235.7 237.5 250 253.6 258.9 264.3 273.2 285.7 292.9 303.6 308.9 308.9 303.6 296.4 294.6
70 235.7 241.1 246.4 251.8 257.1 257.1 258.9 260.7 264.3 266.1 266.1 271.4 273.2 275 278.6
71 219.6 241.1 246.4 258.9 260.7 266.1 278.6 287.5 298.2 317.9 332.1 344.6 348.2 342.9 335.7
72 235.7 239.3 248.2 257.1 260.7 269.6 283.9 300 321.4 335.7 342.9 335.7 328.6 326.8 314.3
73 230.4 235.7 242.9 255.4 264.3 273.2 282.1 294.6 310.7 330.4 358.9 396.4 412.5 407.1 403.6
74 237.5 242.9 255.4 260.7 267.9 275 291.1 300 312.5 310.7 310.7 280.4 269.6 253.6 250
75 235.7 244.6 248.2 257.1 260.7 260.7 269.6 275 282.1 285.7 275 260.7 248.2 239.3 232.1
76 233.9 242.9 255.4 257.1 260.7 266.1 276.8 285.7 308.9 314.3 316.1 310.7 301.8 282.1 269.6
77 228.6 239.3 248.2 258.9 262.5 267.9 273.2 273.2 273.2 271.4 264.3 260.7 257.1 251.8 251.8
78 230.4 244.6 250 262.5 269.6 271.4 276.8 285.7 291.1 300 303.6 303.6 300 292.9 283.9
79 230.4 235.7 237.5 246.4 246.4 246.4 273.2 271.4 273.2 271.4 260.7 258.9 255.4 251.8 248.2
80 233.9 235.7 239.3 248.2 253.6 260.7 262.5 267.9 269.6 271.4 271.4 271.4 267.9 257.1 248.2
81 235.7 244.6 246.4 257.1 258.9 264.3 267.9 269.6 267.9 266.1 266.1 266.1 269.6 271.4 271.4
82 233.9 235.7 248.2 255.4 258.9 267.9 278.6 291.1 303.6 310.7 305.4 301.8 291.1 278.6 269.6
83 233.9 242.9 246.4 257.1 260.7 264.3 276.8 291.1 298.2 308.9 316.1 323.2 323.2 316.1 307.1
84 232.1 241.1 248.2 257.1 262.5 280.4 305.4 342.9 375 408.9 425 430.4 419.6 410.7 392.9
85 221.4 235.7 242.9 250 260.7 266.1 275 287.5 301.8 314.3 317.9 328.6 330.4 332.1 326.8
86 232.1 244.6 246.4 251.8 260.7 269.6 285.7 310.7 325 330.4 333.9 339.3 332.1 342.9 332.1
87 235.7 244.6 253.6 255.4 260.7 271.4 282.1 300 312.5 317.9 323.2 325 323.2 314.3 287.5
88 239.3 246.4 250 258.9 269.6 278.6 305.4 335.7 375 396.4 401.8 425 425 417.9 412.5
89 233.9 239.3 248.2 251.8 264.3 275 296.4 319.6 341.1 346.4 350 353.6 364.3 369.6 371.4
90 237.5 242.9 250 246.4 253.6 260.7 260.7 260.7 260.7 257.1 255.4 258.9 262.5 264.3 262.5
91 235.7 239.3 250 251.8 262.5 264.3 269.6 273.2 276.8 273.2 276.8 276.8 264.3 253.6 241.1
92 235.7 239.3 250 251.8 262.5 264.3 269.6 273.2 276.8 273.2 276.8 276.8 264.3 253.6 241.1
92 NaN NaN NaN NaN NaN 275 292.9 314.3 332.1 350 355.4 360.7 362.5 357.1 355.4
93 233.9 241.1 248.2 255.4 266.1 275 300 325 342.9 366.1 369.6 360.7 344.6 314.3 319.6
94 221.4 225 242.9 250 257.1 260.7 266.1 273.2 278.6 275 271.4 264.3 255.4 242.9 233.9
95 226.8 233.9 237.5 253.6 260.7 267.9 275 291.1 303.6 314.3 330.4 337.5 333.9 321.4 319.6
96 225 237.5 244.6 248.2 255.4 260.7 275 291.1 300 307.1 312.5 316.1 316.1 321.4 328.6
97 232.1 248.2 251.8 258.9 264.3 273.2 292.9 301.8 312.5 317.9 330.4 341.1 382.1 414.3 421.4
98 237.5 241.1 248.2 251.8 260.7 266.1 285.7 310.7 344.6 373.2 398.2 421.4 430.4 414.3 391.1
99 233.9 248.2 253.6 260.7 273.2 285.7 316.1 351.8 380.4 392.9 398.2 401.8 387.5 357.1 326.8
100 219.6 233.9 244.6 253.6 260.7 269.6 285.7 310.7 332.1 369.6 383.9 378.6 351.8 339.3 333.9
101 237.5 244.6 257.1 260.7 267.9 271.4 273.2 278.6 294.6 298.2 287.5 273.2 262.5 248.2 237.5
102 233.9 242.9 255.4 260.7 264.3 273.2 285.7 298.2 316.1 333.9 369.6 387.5 394.6 389.3 373.2
103 239.3 248.2 251.8 260.7 267.9 280.4 300 307.1 314.3 317.9 314.3 305.4 301.8 291.1 282.1
104 239.3 248.2 255.4 262.5 275 287.5 312.5 325 344.6 335.7 310.7 294.6 283.9 273.2 262.5
105 235.7 246.4 250 257.1 266.1 275 296.4 319.6 333.9 335.7 328.6 332.1 332.1 341.1 344.6
106 232.1 241.1 248.2 251.8 262.5 266.1 278.6 292.9 298.2 303.6 308.9 310.7 307.1 305.4 301.8
107 239.3 244.6 251.8 260.7 271.4 285.7 310.7 333.9 350 360.7 362.5 364.3 389.3 380.4 305.4
108 235.7 241.1 248.2 257.1 258.9 269.6 282.1 294.6 296.4 298.2 298.2 292.9 280.4 275 262.5
109 239.3 250 255.4 266.1 276.8 289.3 310.7 328.6 342.9 348.2 348.2 346.4 344.6 335.7 325
110 237.5 251.8 255.4 267.9 275 287.5 301.8 314.3 323.2 325 333.9 337.5 341.1 332.1 328.6
111 237.5 246.4 251.8 258.9 262.5 278.6 294.6 301.8 314.3 323.2 328.6 323.2 312.5 308.9 301.8
112 237.5 241.1 251.8 257.1 267.9 278.6 301.8 323.2 346.4 358.9 358.9 353.6 357.1 360.7 369.6
113 235.7 242.9 248.2 255.4 266.1 278.6 300 321.4 332.1 337.5 339.3 339.3 337.5 321.4 308.9
114 230.4 244.6 248.2 258.9 269.6 285.7 323.2 357.1 387.5 403.6 396.4 360.7 357.1 360.7 312.5
115 237.5 246.4 250 258.9 271.4 289.3 321.4 357.1 385.7 389.3 410.7 391.1 355.4 325 301.8
116 235.7 246.4 253.6 260.7 266.1 278.6 303.6 333.9 348.2 350 341.1 335.7 328.6 323.2 323.2
117 235.7 241.1 253.6 260.7 269.6 285.7 316.1 341.1 364.3 400 428.6 423.2 392.9 369.6 351.8
118 241.1 242.9 255.4 260.7 275 285.7 305.4 332.1 351.8 369.6 373.2 366.1 351.8 337.5 348.2
119 237.5 244.6 253.6 257.1 267.9 280.4 294.6 319.6 333.9 342.9 337.5 330.4 316.1 301.8 294.6
120 237.5 244.6 251.8 257.1 264.3 271.4 298.2 319.6 337.5 350 369.6 382.1 407.1 400 369.6
121 225 242.9 248.2 257.1 267.9 273.2 287.5 298.2 307.1 319.6 316.1 307.1 289.3 271.4 258.9
122 248.2 251.8 257.1 264.3 269.6 280.4 298.2 321.4 330.4 330.4 321.4 316.1 314.3 314.3 307.1