<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-17 -107 03:45:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.17 (107) 03:45:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.19" 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">
FF202610704170345001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.375" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.395" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.456" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.025" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.025" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.825" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="237.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="237.500" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.025" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.025" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="268.803" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.659" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.487" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="48.393" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.536" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="26.234" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="40.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.930" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="55">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
237.500 237.500 237.500 240.000 240.000 240.000 241.250 242.500 242.500 242.500 243.750 245.000 246.250 247.500 247.500 248.750 250.000 250.000 252.500 252.500 255.000 255.000 255.000 257.500 257.500 260.000 260.000 262.500 262.500 265.000 267.500 267.500 270.000 272.500 275.000 276.875 278.750 280.625 282.500 282.500 287.500 292.500 295.000 297.500 297.500 307.500 307.500 310.000 322.500 325.000 332.500 342.500 350.000 364.281 382.779
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 63 63 78 78 0 78 69 66 0 0 0 54 75 0 81 78 63 66 63 69 66 63 66 69 69 69 69 69 66 72 48 48 54 0 0 0 66 66 93 87 78 81 108 99 81 84 93 96 93 87 87 81 69
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="576">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 139.75 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 169.5 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 199.25 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 268.803 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0 577.0 578.0 579.0 580.0 581.0 582.0 583.0 584.0 585.0 586.0 587.0 588.0 589.0 590.0 591.0 592.0 593.0 594.0 595.0 596.0 597.0 598.0 599.0 600.0 601.0 602.0 603.0 604.0 605.0 606.0 607.0 608.0 609.0 610.0 611.0 612.0 613.0 614.0 615.0 616.0 617.0 618.0 619.0 620.0 621.0 622.0 623.0 624.0 625.0 626.0 627.0 628.0 629.0 630.0 631.0 632.0 633.0 634.0 635.0 636.0 637.0 638.0 639.0 640.0 641.0 642.0 643.0 644.0 645.0 646.0 647.0 648.0 649.0 650.0 651.0 652.0 653.0 654.0 655.0 656.0 657.0 658.0 659.0 660.0 661.0 662.0 663.0 664.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
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0.56385165 0.5926876 0.62227327 0.6528044 0.68449223 0.7175252 0.75211424 0.7884943 0.8269154 0.8676429 0.91100013 0.9573393 1.0070585 1.0605971 1.118443 1.1811098 1.2490997 1.3228815 1.4027449 1.4886639 1.5801945 1.676294 1.7753868 1.8755336 1.9746957 2.0712101 2.163798 2.2517328 2.3346462 2.412495 2.4854143 2.5536506 2.6174552 2.677147 2.7330084 2.7853093 2.8342943 2.8801918 2.9232051 2.9635272 3.0013118 3.03671 3.0698493 3.100855 3.1298232 3.156849 3.1820207 3.2054129 3.2270875 3.2471068 3.2655249 3.2823899 3.2977476 3.3116312 3.3240738 3.3351083 3.3447597 3.3530462 3.35999 3.365604 3.3699017 3.3728921 3.374582 3.375 3.3749814 3.3743203 3.372729 3.3702307 3.3668485 3.362606 3.357527 3.3516347 3.344953 3.3375056 3.3293154 3.3204062 3.3108013 3.3005235 3.2895958 3.278041 3.265881 3.2531388 3.2398355 3.2259934 3.2116332 3.1967762 3.181443 3.165654 3.1494288 3.1327872 3.1157482 3.098331 3.0805535 3.0624342 3.0439906 3.02524 3.006199 2.9868839 2.9673111 2.9474964 2.9274547 2.9072008 2.8867495 2.8661144 2.8453095 2.824348 2.8032427 2.7820063 2.7606506 2.7391877 2.717629 2.6959853 2.6742675 2.6524858 2.6306503 2.6087704 2.586856 2.5649157 2.542958 2.5209918 2.4990249 2.477065 2.4551198 2.4331963 2.4113016 2.3894424 2.367625 2.3458552 2.3241396 2.3024833 2.2808917 2.2593703 2.2379239 2.2165568 2.195274 2.17408 2.1529784 2.1319733 2.1110682 2.090267 2.0695727 2.0489886 2.0285177 2.008163 1.9879268 1.9678121 1.947821 1.9279557 1.9082185 1.8886112 1.8691356 1.8497936 1.8305866 1.8115162 1.7925837 1.7737902 1.7551372 1.7366256 1.7182561 1.70003 1.6819476 1.6640098 1.6462173 1.6285704 1.6110698 1.5937155 1.5765082 1.5594478 1.5425345 1.5257685 1.5091498 1.4926784 1.4763541 1.460177 1.4441466 1.4282628 1.4125255 1.3969343 1.3814886 1.3661882 1.3510326 1.3360213 1.3211539 1.3064296 1.2918482 1.2774087 1.2631106 1.2489533 1.2349361 1.2210582 1.2073189 1.1937175 1.180253 1.166925 1.1537322 1.140674 1.1277497 1.1149582 1.1022986 1.0897702 1.077372 1.0651029 1.0529623 1.0409491 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</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="3.375" PeakHeight="268.803" Num="5" zHalfNm="234.659" Error="1.715">
-79.293 15.766 -9.668 3.642 -0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="10" 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="6509.75" A="-1.71482022E11" B="5.2926548E7" C="-4083.7134" Error="0.00152"/>
<QuasiParabolic ID="2" StartDistance="6509.75" EndDistance="6539.5" A="0.0" B="-1694.1346" C="0.30026865" Error="0.0302"/>
<QuasiParabolic ID="3" StartDistance="6539.5" EndDistance="6565.0" A="7.8207255E10" B="-2.3988164E7" C="1839.4716" Error="0.0302"/>
<QuasiParabolic ID="4" StartDistance="6565.0" EndDistance="6566.0" A="-2.50666523E12" B="7.634825E8" C="-58135.445" Error="0.0"/>
<QuasiParabolic ID="5" StartDistance="6566.0" EndDistance="6576.0" A="3.6119241E12" B="-1.10023642E9" C="83786.5" Error="0.0719"/>
<QuasiParabolic ID="6" StartDistance="6576.0" EndDistance="6578.0" A="-3.0745774E12" B="9.3337107E8" C="-70836.945" Error="0.0112"/>
<QuasiParabolic ID="7" StartDistance="6578.0" EndDistance="6586.0" A="4.5982212E12" B="-1.39949568E9" C="106486.45" Error="0.0143"/>
<QuasiParabolic ID="8" StartDistance="6586.0" EndDistance="6600.0" A="2.10358963E13" B="-6.3911977E9" C="485449.6" Error="0.0687"/>
<QuasiParabolic ID="9" StartDistance="6600.0" EndDistance="6638.803" A="-9.4195857E12" B="2.83773594E9" C="-213712.08" Error="0.0266"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="89.25" Depth="0.154"/>
<TopsideChapman PeakHeight="268.803" PeakDensity="141322.89" PeakScaleHeight="26.234" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
