<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 01:05:00.000"
URSICode="SMK29"
StationName="Santa Maria"
GeoLatitude="-29.69"
GeoLongitude="307.81"
Source="Ionosonde"
SourceType="DPS-4D"
ScalerType="auto">
<SystemInfo UMLStationID="129">
<FrequencyStepping StartFrequency="2.0" StopFrequency="15.0">
<LinearStepping Step="0.025" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="2.5" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.20 (110) 01:05:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.20" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.98" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="78.74007" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202611004200105001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="4.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.358" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="13.601" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.875" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="247.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="247.500" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.675" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="292.500" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.875" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.875" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="273.837" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="244.639" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.238" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="41.657" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.915" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.547" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="37.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="48">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.875 2.9 2.925 2.95 2.975 3.0 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2 3.225 3.25 3.275 3.3 3.325 3.35 3.375 3.4 3.425 3.45 3.475 3.5 3.525 3.55 3.575 3.6 3.625 3.65 3.675 3.7 3.725 3.75 3.775 3.8 3.825 3.85 3.875 3.9 3.925 3.95 3.975 4.0 4.025 4.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
247.500 248.125 248.750 249.375 250.000 250.000 250.000 252.500 252.500 252.500 255.000 255.000 257.500 257.500 260.000 260.000 262.500 265.000 265.000 265.000 267.500 267.500 272.500 272.500 275.000 275.000 277.500 280.000 282.500 285.000 287.500 290.000 292.500 300.000 305.000 308.750 311.486 314.498 317.829 321.532 325.674 330.338 335.629 341.682 348.675 356.846 366.519 378.150
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 66 69 81 78 81 81 84 87 84 84 84 87 108 102 93 96 90 84 93 96 78 69 75 81 84 81 81 78 78 78 57 0 54 0 0 69 93 99 78 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 1.5625 1.5625 -7.8125 -1.5625 -1.5625 -1.5625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="25">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.25 2.275 2.3 2.325 2.35 2.375 2.4 2.425 2.45 2.475 2.5 2.525 2.55 2.575 2.6 2.625 2.65 2.675 2.7 2.725 2.75 2.775 2.8 2.825 2.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 102.500 102.500 102.500 102.500 102.500 102.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 66 66 63 66 78 78 96 0 0 87 87 87 87 87 87 72 87 90 81 84 84 81 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.5625 1.5625 -1.5625 -1.5625 1.5625 1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="538">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 142.08333 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 174.16667 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 206.25 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 273.837 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0 577.0 578.0 579.0 580.0 581.0 582.0 583.0 584.0 585.0 586.0 587.0 588.0 589.0 590.0 591.0 592.0 593.0 594.0 595.0 596.0 597.0 598.0 599.0 600.0 601.0 602.0 603.0 604.0 605.0 606.0 607.0 608.0 609.0 610.0 611.0 612.0 613.0 614.0 615.0 616.0 617.0 618.0 619.0 620.0 621.0 622.0 623.0 624.0 625.0 626.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21213934 0.23390245 0.2526677 0.26895854 0.28319094 0.29565945 0.30659118 0.31614733 0.32445762 0.331616 0.33769703 0.34275886 0.34684667 0.3499937 0.352225 0.3535571 0.354 0.3538872 0.35354906 0.35298675 0.3521277 0.3511249 0.34983355 0.34833378 0.34655926 0.3445913 0.34229675 0.3398302 0.33706498 0.33401984 0.33071515 0.327109 0.32322994 0.31904808 0.31454307 0.3097052 0.30453598 0.29904887 0.29310012 0.2867813 0.2800439 0.2727352 0.26502842 0.25670934 0.24776544 0.23820302 0.22786881 0.21668318 0.20459439 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.2088 0.2136 0.2184 0.2232 0.228 0.2328 0.2376 0.2424 0.2472 0.252 0.2568 0.2616 0.2664 0.2712 0.276 0.2808 0.2856 0.2904 0.2952 0.3 0.3048 0.3096 0.3144 0.3192 0.324 0.3288 0.3336 0.3384 0.3432 0.348 0.3528 0.354 0.37140536 0.397194 0.42594057 0.45750925 0.49160546 0.5278893 0.5660335 0.60575813 0.64688236 0.6893071 0.7329978 0.7779678 0.82428783 0.8720316 0.9213237 0.97230387 1.0251125 1.0799345 1.1369466 1.1963536 1.2583808 1.3232449 1.3911891 1.4624813 1.5373497 1.6160234 1.698696 1.785485 1.8764478 1.9714677 2.0702627 2.1723218 2.276927 2.3831177 2.489765 2.5957074 2.699804 2.801003 2.8985426 2.9918034 3.0803847 3.1641402 3.2429857 3.3169932 3.3862717 3.451008 3.5113952 3.567626 3.6199145 3.6684449 3.7134027 3.7549639 3.793293 3.828523 3.86079 3.8902156 3.916908 3.940953 3.962441 3.9814448 3.9980292 4.012248 4.024149 4.0337706 4.0411434 4.0462914 4.0492306 4.05 4.049979 4.0489593 4.0464334 4.042446 4.0370417 4.0302644 4.022159 4.01277 4.002142 3.9903195 3.9773462 3.963266 3.948122 3.9319575 3.9148147 3.8967357 3.8777611 3.857932 3.837288 3.8158681 3.7937107 3.7708535 3.747333 3.7231853 3.6984453 3.6731474 3.6473248 3.62101 3.5942347 3.5670295 3.539424 3.5114477 3.483128 3.4544926 3.4255676 3.3963788 3.3669503 3.3373063 3.3074696 3.2774625 3.2473063 3.2170215 3.1866279 3.1561446 3.1255898 3.0949814 3.0643358 3.0336697 3.002998 2.972336 2.941698 2.911097 2.8805466 2.8500588 2.8196454 2.7893178 2.7590868 2.7289622 2.6989539 2.6690712 2.6393225 2.6097162 2.58026 2.5509615 2.5218272 2.492864 2.464078 2.4354746 2.40706 2.3788383 2.3508148 2.322994 2.2953796 2.2679756 2.2407856 2.2138124 2.1870594 2.1605294 2.1342244 2.108147 2.082299 2.0566823 2.0312984 2.0061488 1.9812348 1.9565572 1.9321167 1.9079145 1.8839507 1.8602259 1.8367403 1.813494 1.7904868 1.7677188 1.7451897 1.722899 1.7008462 1.6790308 1.6574522 1.6361095 1.6150019 1.5941286 1.5734884 1.5530803 1.5329031 1.5129557 1.4932368 1.473745 1.454479 1.4354373 1.4166186 1.3980212 1.3796436 1.3614843 1.3435415 1.3258137 1.3082992 1.2909962 1.273903 1.257018 1.2403392 1.2238649 1.2075932 1.1915225 1.1756506 1.159976 1.1444967 1.1292108 1.1141164 1.0992117 1.0844948 1.0699638 1.0556169 1.0414519 1.0274673 1.0136609 1.0000311 0.9865758 0.9732932 0.9601814 0.94723856 0.93446285 0.9218523 0.9094052 0.8971196 0.88499373 0.8730258 0.8612139 0.8495563 0.83805126 0.82669693 0.8154915 0.80443335 0.79352057 0.78275156 0.7721246 0.7616379 0.75128984 0.74107873 0.7310029 0.7210607 0.7112505 0.7015707 0.6920196 0.68259573 0.67329746 0.6641232 0.65507144 0.6461407 0.63732934 0.6286359 0.62005895 0.611597 0.60324854 0.5950121 0.5868864 0.5788699 0.57096124 0.56315905 0.55546194 0.54786855 0.54037756 0.53298765 0.5256975 0.5185059 0.51141137 0.50441283 0.49750897 0.49069852 0.4839803 0.4773531 0.47081572 0.46436697 0.4580057 0.45173073 0.44554096 0.43943527 0.4334125 0.42747158 0.42161146 0.415831 0.4101292 0.40450498 0.3989573 0.39348522 0.38808763 0.3827636 0.37751213 0.37233225 0.367223 0.36218345 0.35721263 0.35230967 0.34747362 0.3427036 0.33799872 0.3333581 0.3287809 0.3242662 0.31981322 0.31542113 0.31108907 0.30681625 0.3026019 0.29844517 0.29434535 0.2903016 0.2863132 0.2823794 0.27849945 0.27467263 0.27089822 0.26717553 0.2635038 0.2598824 0.2563106 0.25278777 0.24931319 0.24588625 0.2425063 0.23917268 0.23588477 0.23264195 0.2294436 0.22628912 0.22317791 0.22010937 0.21708295 0.21409804 0.21115409 0.20825055 0.20538685 0.20256247 0.19977684 0.19702946 0.1943198 0.19164734 0.18901157 0.18641199 0.18384811 0.18131946 0.17882551 0.17636584 0.17393993 0.17154735 0.16918765 0.16686036 0.16456504 0.16230127 0.1600686 0.1578666 0.15569486 0.15355296 0.1514405 0.14935708 0.14730228 0.14527574 0.14327705 0.14130582 0.1393617 0.13744429 0.13555326 0.1336882 0.1318488 0.13003469 0.1282455 0.12648092 0.124740615 0.12302423 0.121331446 0.11966194 0.11801539 0.11639149 0.11478992 0.113210365 0.11165254 0.11011614 0.10860087 0.10710644 0.10563256 0.10417896 0.10274535 0.10133145 0.09993701 0.09856174 0.09720539 0.09586771 0.09454842 0.09324728 0.091964036 0.09069845 0.08945027 0.08821926 0.08700519 0.08580782 0.08462693 0.083462276 0.08231365 0.081180826 0.08006359 0.07896172 0.07787502 0.07680326 0.07574625 0.07470379 0.07367567 0.07266169 0.071661666 0.0706754 0.069702715 0.0687434 0.067797296 0.06686421 0.06594396 0.065036364 0.064141266 0.063258484 0.06238785 0.061529197 0.06068236 0.059847176 0.059023485 0.058211125 0.05740995 0.056619797 0.05584052 0.055071965 0.054313987 0.053566437 0.05282918 0.052102067 0.05138496 0.05067772

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="4.05" PeakHeight="273.837" Num="5" zHalfNm="244.639" Error="2.687">
-73.374 10.166 -6.785 3.445 -1.039
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="8" EarthRadius="6370.0">
<QuasiParabolic ID="0" StartDistance="6460.0205" EndDistance="6480.001" A="-5.5027394E11" B="1.69837632E8" C="-13104.63" Error="0.0016"/>
<QuasiParabolic ID="1" StartDistance="6480.0" EndDistance="6512.083" A="-1.47549225E11" B="4.5539884E7" C="-3513.7546" Error="0.00163"/>
<QuasiParabolic ID="2" StartDistance="6512.083" EndDistance="6544.167" A="0.0" B="1027.4938" C="-0.11775644" Error="0.0187"/>
<QuasiParabolic ID="3" StartDistance="6544.167" EndDistance="6575.0" A="3.38293187E10" B="-1.0429687E7" C="803.8546" Error="0.0187"/>
<QuasiParabolic ID="4" StartDistance="6575.0" EndDistance="6590.0" A="4.9420493E12" B="-1.50342438E9" C="114339.58" Error="0.0259"/>
<QuasiParabolic ID="5" StartDistance="6590.0" EndDistance="6595.0" A="7.4633015E12" B="-2.26859955E9" C="172395.36" Error="0.0111"/>
<QuasiParabolic ID="6" StartDistance="6595.0" EndDistance="6614.0" A="2.2740453E13" B="-6.9015491E9" C="523642.47" Error="0.0454"/>
<QuasiParabolic ID="7" StartDistance="6614.0" EndDistance="6643.837" A="-1.84750577E13" B="5.5615626E9" C="-418534.12" Error="0.00655"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="96.25" Depth="0.154"/>
<TopsideChapman PeakHeight="273.837" PeakDensity="203504.97" PeakScaleHeight="22.547" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
