<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 40% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, Unidentified traces above foF2</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.18 (108) 03:45:00</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">
FF202610804180345001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.875" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.378" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.713" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.175" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.175" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="292.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="292.500" 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="2.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="327.765" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.175" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.175" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="291.760" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="261.050" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.487" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="43.993" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.046" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="24.136" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="38.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
292.500 295.000 295.714 296.429 297.143 297.857 298.571 299.286 300.000 300.000 302.500 305.000 305.000 305.000 305.000 307.500 307.500 307.500 308.340 309.357 310.614 312.208 314.295 317.144 321.267 327.765 339.520 367.246 512.418
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 66 69 66 72 72 81 81 66 0 69 69 72 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="555">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 147.39433 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 184.78867 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 222.183 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 291.76 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0 577.0 578.0 579.0 580.0 581.0 582.0 583.0 584.0 585.0 586.0 587.0 588.0 589.0 590.0 591.0 592.0 593.0 594.0 595.0 596.0 597.0 598.0 599.0 600.0 601.0 602.0 603.0 604.0 605.0 606.0 607.0 608.0 609.0 610.0 611.0 612.0 613.0 614.0 615.0 616.0 617.0 618.0 619.0 620.0 621.0 622.0 623.0 624.0 625.0 626.0 627.0 628.0 629.0 630.0 631.0 632.0 633.0 634.0 635.0 636.0 637.0 638.0 639.0 640.0 641.0 642.0 643.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
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2.766098 2.7535298 2.7404306 2.7268233 2.7127311 2.6981761 2.6831799 2.6677642 2.65195 2.6357577 2.6192074 2.6023185 2.5851107 2.567602 2.549811 2.5317552 2.5134523 2.4949183 2.47617 2.4572232 2.438093 2.4187946 2.399342 2.3797495 2.3600307 2.3401983 2.320265 2.3002434 2.280145 2.2599812 2.2397628 2.2195005 2.1992047 2.178885 2.1585507 2.1382113 2.1178749 2.09755 2.0772448 2.0569668 2.0367234 2.0165215 1.996368 1.9762694 1.9562316 1.9362606 1.9163618 1.8965406 1.8768021 1.857151 1.8375919 1.8181292 1.7987667 1.7795087 1.7603585 1.7413197 1.7223955 1.7035891 1.684903 1.6663404 1.6479034 1.6295947 1.6114161 1.59337 1.575458 1.557682 1.5400436 1.5225443 1.5051852 1.4879678 1.4708931 1.4539621 1.4371756 1.4205345 1.4040393 1.3876907 1.3714892 1.3554351 1.3395288 1.3237705 1.3081603 1.2926984 1.2773846 1.2622191 1.2472016 1.2323319 1.2176099 1.2030351 1.1886073 1.1743261 1.1601908 1.1462014 1.1323569 1.1186568 1.1051006 1.0916877 1.0784173 1.0652885 1.0523009 1.0394536 1.0267457 1.0141762 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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="2.875" PeakHeight="291.76" Num="5" zHalfNm="261.05" Error="3.158">
-74.732 9.855 -7.311 4.262 -1.651
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="9" 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="6517.394" A="-1.08774023E11" B="3.3572232E7" C="-2590.3245" Error="0.00179"/>
<QuasiParabolic ID="2" StartDistance="6517.394" EndDistance="6554.789" A="0.0" B="-565.4771" C="0.12680347" Error="0.0134"/>
<QuasiParabolic ID="3" StartDistance="6554.789" EndDistance="6591.0" A="3.7137113E10" B="-1.1396378E7" C="874.3223" Error="0.0134"/>
<QuasiParabolic ID="4" StartDistance="6591.0" EndDistance="6595.0" A="3.69122161E12" B="-1.12020672E9" C="84989.805" Error="0.0103"/>
<QuasiParabolic ID="5" StartDistance="6595.0" EndDistance="6615.0" A="3.16491327E12" B="-9.605984E8" C="72889.1" Error="0.0156"/>
<QuasiParabolic ID="6" StartDistance="6615.0" EndDistance="6634.0" A="1.12316761E13" B="-3.39952896E9" C="257237.6" Error="0.0176"/>
<QuasiParabolic ID="7" StartDistance="6634.0" EndDistance="6642.0" A="-1.82689936E13" B="5.4942515E9" C="-413080.53" Error="0.00892"/>
<QuasiParabolic ID="8" StartDistance="6642.0" EndDistance="6661.76" A="-7.614017E12" B="2.28588749E9" C="-171559.56" Error="0.00473"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="112.183" Depth="0.154"/>
<TopsideChapman PeakHeight="291.76" PeakDensity="102551.18" PeakScaleHeight="24.136" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
