<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 05:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.18 (108) 05:10:00</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">
FF202610804180510001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.525" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.607" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.713" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="222.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="222.500" Name="h`F2" 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="0.075" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="273.109" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="248.252" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="218.170" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.382" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="42.638" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.486" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.412" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="33.960" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="62">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.025 2.05 2.075 2.1 2.125 2.15 2.175 2.2 2.225 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
222.500 222.500 222.500 222.500 222.500 222.500 225.000 225.000 225.000 225.000 225.000 225.000 227.500 227.500 227.500 227.500 227.500 230.000 230.000 230.000 232.500 232.500 232.500 232.500 232.500 235.000 235.000 236.250 237.500 237.500 240.000 240.000 242.500 242.500 242.500 242.500 245.000 246.250 247.500 247.500 250.000 252.500 252.500 255.000 255.000 255.000 257.500 260.000 262.500 264.678 267.132 269.918 273.109 276.800 281.117 286.236 292.403 299.975 309.496 321.828 338.432 361.994
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 78 78 81 81 81 78 93 93 72 72 57 57 69 72 69 69 87 87 90 84 75 75 78 75 87 90 69 75 75 72 72 66 60 63 57 54 0 63 66 69 78 84 93 93 96 96 96 93 93 93 105 102 90 90 90 90 90 87 87 78 84
</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 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="516">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 136.25 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 162.5 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 188.75 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 248.252 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0 577.0 578.0 579.0 580.0 581.0 582.0 583.0 584.0 585.0 586.0 587.0 588.0 589.0 590.0 591.0 592.0 593.0 594.0 595.0 596.0 597.0 598.0 599.0 600.0 601.0 602.0 603.0 604.0
</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 0.353812 0.35332385 0.3524629 0.35123456 0.3496469 0.3477836 0.34551057 0.34284618 0.3398121 0.3363646 0.33256927 0.32832938 0.32366115 0.31855893 0.31297255 0.3068771 0.30027556 0.29307804 0.2853064 0.27685073 0.26765716 0.25764734 0.24675402 0.23483722 0.22173925 0.20734549 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 0.20293333 0.2088 0.21466666 0.22053333 0.2264 0.23226666 0.23813333 0.244 0.24986666 0.25573334 0.2616 0.26746666 0.27333334 0.2792 0.28506666 0.29093334 0.2968 0.30266666 0.30853334 0.3144 0.32026666 0.32613334 0.332 0.33786666 0.34373334 0.3496 0.354 0.36154816 0.39346698 0.427662 0.46360445 0.5009283 0.5394583 0.579143 0.62005335 0.662307 0.7060975 0.7516483 0.7992137 0.8491244 0.9017346 0.9574634 1.0168271 1.080406 1.1489102 1.223163 1.3041396 1.3928914 1.490524 1.5979351 1.7153773 1.8418157 1.9743675 2.1083584 2.238726 2.3614535 2.4744065 2.5770836 2.669914 2.7537706 2.8296509 2.898458 2.9610395 3.0181189 3.0702872 3.1180649 3.1618905 3.2021263 3.2390862 3.2730322 3.30419 3.3327615 3.3589122 3.3827853 3.4045029 3.4241762 3.4418993 3.4577546 3.4718077 3.4841237 3.4947495 3.50373 3.5111 3.5168886 3.5211165 3.523801 3.5249515 3.525 3.524651 3.523111 3.5203743 3.516475 3.5114477 3.505327 3.4981477 3.489944 3.480751 3.470603 3.459534 3.447578 3.4347687 3.4211395 3.4067233 3.3915522 3.3756588 3.359074 3.3418295 3.3239553 3.3054812 3.2864368 3.2668505 3.2467506 3.2261643 3.205119 3.1836398 3.1617532 3.1394835 3.116855 3.0938911 3.070615 3.0470488 3.023214 2.9991314 2.9748213 2.9503036 2.925597 2.9007196 2.87569 2.8505244 2.82524 2.7998524 2.774377 2.748829 2.7232223 2.6975706 2.671887 2.6461844 2.620475 2.5947704 2.5690818 2.5434196 2.5177944 2.4922159 2.4666932 2.4412358 2.4158516 2.390549 2.365336 2.3402195 2.3152068 2.2903042 2.2655184 2.2408555 2.2163205 2.191919 2.1676564 2.1435373 2.1195657 2.0957463 2.072083 2.0485792 2.0252385 2.0020642 1.9790591 1.9562262 1.9335678 1.9110864 1.8887842 1.8666631 1.8447249 1.8229713 1.8014038 1.7800236 1.7588319 1.7378297 1.7170179 1.6963973 1.6759684 1.6557318 1.6356878 1.6158369 1.5961789 1.576714 1.5574424 1.5383638 1.519478 1.5007846 1.4822834 1.4639739 1.4458555 1.4279277 1.4101899 1.3926413 1.3752812 1.3581088 1.341123 1.3243232 1.3077081 1.291277 1.2750288 1.2589623 1.2430763 1.2273699 1.2118417 1.1964905 1.1813153 1.1663145 1.151487 1.1368314 1.1223464 1.1080307 1.0938828 1.0799015 1.0660852 1.0524327 1.0389425 1.0256131 1.0124431 0.99943095 0.9865754 0.973875 0.9613281 0.94893336 0.9366893 0.9245944 0.91264725 0.90084636 0.88919026 0.87767744 0.8663065 0.85507596 0.84398437 0.8330302 0.8222121 0.81152856 0.8009782 0.79055953 0.7802711 0.77011156 0.76007944 0.7501734 0.74039197 0.73073375 0.7211974 0.71178156 0.70248485 0.6933059 0.6842433 0.6752959 0.6664621 0.65774083 0.6491307 0.64063036 0.63223857 0.623954 0.61577547 0.60770166 0.5997314 0.59186333 0.5840964 0.5764292 0.56886065 0.56138957 0.55401474 0.546735 0.53954923 0.5324562 0.5254549 0.5185441 0.5117227 0.5049896 0.49834383 0.4917842 0.48530963 0.47891912 0.4726116 0.46638605 0.46024147 0.45417678 0.44819105 0.44228327 0.43645245 0.43069762 0.42501783 0.41941217 0.41387963 0.40841937 0.40303043 0.39771187 0.39246288 0.3872825 0.3821699 0.37712422 0.3721446 0.36723018 0.36238015 0.3575937 0.35286996 0.34820816 0.34360752 0.33906722 0.33458653 0.33016464 0.32580084 0.32149434 0.3172444 0.31305033 0.30891138 0.30482686 0.30079603 0.29681823 0.29289275 0.28901893 0.2851961 0.28142357 0.27770072 0.2740269 0.27040148 0.2668238 0.26329327 0.25980926 0.25637117 0.25297838 0.24963035 0.24632646 0.24306613 0.23984882 0.23667394 0.23354095 0.2304493 0.22739846 0.22438787 0.22141702 0.2184854 0.21559249 0.21273777 0.20992075 0.20714094 0.20439786 0.201691 0.19901991 0.1963841 0.19378313 0.19121653 0.18868385 0.18618464 0.18371847 0.18128492 0.17888352 0.17651388 0.17417558 0.17186818 0.16959131 0.16734454 0.1651275 0.16293979 0.160781 0.15865079 0.15654874 0.15447451 0.15242773 0.15040803 0.14841504 0.14644845 0.14450787 0.14259298 0.14070344 0.1388389 0.13699904 0.13518353 0.13339207 0.13162431 0.12987997 0.1281587 0.12646024 0.12478425 0.12313047 0.12149858 0.1198883 0.11829934 0.11673143 0.115184285 0.11365762 0.11215118 0.110664696 0.10919789 0.10775052 0.10632232 0.10491303 0.10352242 0.10215023 0.10079621 0.09946013 0.09814175 0.096840836 0.09555716 0.09429049 0.09304059 0.09180726 0.090590276 0.089389406 0.08820445 0.0870352 0.08588144 0.08474296 0.08361958 0.08251108 0.08141727 0.08033795 0.07927293 0.07822204 0.07718506 0.076161824 0.07515215 0.07415586 0.07317277 0.07220271 0.071245514 0.070301 0.069368996 0.06844935 0.06754189 0.06664646 0.0657629 0.06489105 0.06403075 0.063181855 0.062344212 0.061517674 0.06070209 0.05989732 0.059103213 0.058319632 0.057546437 0.056783494 0.05603066 0.05528781 0.054554805 0.053831514 0.053117815 0.052413575 0.05171867 0.051032975 0.050356373

</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="3.525" PeakHeight="248.252" Num="5" zHalfNm="218.17" Error="0.935">
-69.89 17.235 -10.413 4.486 -0.92
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="11" 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="6506.25" A="-2.20048884E11" B="6.791632E7" C="-5240.3315" Error="0.00141"/>
<QuasiParabolic ID="2" StartDistance="6506.25" EndDistance="6532.5" A="0.0" B="-288.5235" C="0.084358215" Error="0.00477"/>
<QuasiParabolic ID="3" StartDistance="6532.5" EndDistance="6556.0" A="6.9272748E10" B="-2.130543E7" C="1638.1735" Error="0.00477"/>
<QuasiParabolic ID="4" StartDistance="6556.0" EndDistance="6557.0" A="-2.11427079E12" B="6.4481523E8" C="-49164.195" Error="6.37E-11"/>
<QuasiParabolic ID="5" StartDistance="6557.0" EndDistance="6562.0" A="6.5645204E12" B="-2.00236838E9" C="152695.16" Error="0.0304"/>
<QuasiParabolic ID="6" StartDistance="6562.0" EndDistance="6565.0" A="1.85540346E12" B="-5.6709946E8" C="43333.008" Error="0.00618"/>
<QuasiParabolic ID="7" StartDistance="6565.0" EndDistance="6575.0" A="7.4426399E12" B="-2.26922778E9" C="172969.6" Error="0.0235"/>
<QuasiParabolic ID="8" StartDistance="6575.0" EndDistance="6588.0" A="3.6493955E13" B="-1.11061299E10" C="844977.4" Error="0.0288"/>
<QuasiParabolic ID="9" StartDistance="6588.0" EndDistance="6595.0" A="-4.6977518E13" B="1.42343291E10" C="-1078251.1" Error="0.0183"/>
<QuasiParabolic ID="10" StartDistance="6595.0" EndDistance="6618.252" A="-1.13330147E13" B="3.42477568E9" C="-258724.77" Error="0.011"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="78.75" Depth="0.154"/>
<TopsideChapman PeakHeight="248.252" PeakDensity="154164.08" PeakScaleHeight="23.412" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
