<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-27 -117 23:45:00.000"
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: 75% PACIFIC flags: Multiple candidates for F2o cusp, Unidentified traces above foF2</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.27 (117) 23:45:00</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">
FF202611704272345001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.185" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.785" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.075" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="317.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="317.500" 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="3.575" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="358.425" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.939" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.270" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.088" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="45.608" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.722" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.521" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="46.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.870" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="25">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
317.500 320.000 321.250 322.500 325.000 327.500 327.500 330.000 331.250 332.500 335.000 337.500 340.000 340.000 345.000 347.500 352.500 355.000 355.000 358.425 362.371 366.964 372.380 378.859 386.751
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 78 0 75 0 75 78 84 0 72 75 78 75 72 72 72 69 69 72 69 69 69 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 -4.6875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="574">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 145.10367 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 180.20734 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 215.311 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 300.939 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0 577.0 578.0 579.0 580.0 581.0 582.0 583.0 584.0 585.0 586.0 587.0 588.0 589.0 590.0 591.0 592.0 593.0 594.0 595.0 596.0 597.0 598.0 599.0 600.0 601.0 602.0 603.0 604.0 605.0 606.0 607.0 608.0 609.0 610.0 611.0 612.0 613.0 614.0 615.0 616.0 617.0 618.0 619.0 620.0 621.0 622.0 623.0 624.0 625.0 626.0 627.0 628.0 629.0 630.0 631.0 632.0 633.0 634.0 635.0 636.0 637.0 638.0 639.0 640.0 641.0 642.0 643.0 644.0 645.0 646.0 647.0 648.0 649.0 650.0 651.0 652.0 653.0 654.0 655.0 656.0 657.0 658.0 659.0 660.0 661.0 662.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
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0.3219266 0.3263136 0.3307006 0.33508763 0.33947462 0.34386164 0.34824863 0.35263565 0.354 0.37032512 0.39339143 0.416197 0.43905827 0.46220195 0.4857928 0.5099566 0.5348058 0.5604334 0.5869224 0.6143547 0.642793 0.67230445 0.70294017 0.7347464 0.7677648 0.8020263 0.8375512 0.874344 0.9124047 0.95172334 0.9922696 1.0340149 1.0769117 1.1209093 1.1659399 1.2119436 1.258849 1.306593 1.3550922 1.4042724 1.4540676 1.5044191 1.5552415 1.6064911 1.6581053 1.710028 1.7622172 1.814612 1.8671869 1.9198898 1.9726934 2.0255582 2.0784466 2.1313407 2.1842031 2.2369955 2.2897017 2.3422952 2.3947299 2.4470015 2.4990537 2.5508769 2.6024187 2.65365 2.7045338 2.7550392 2.8051019 2.8546834 2.9037364 2.9522028 3.000024 3.0471158 3.093435 3.1388886 3.1833932 3.2268589 3.2692018 3.310299 3.3500564 3.388358 3.4250736 3.460077 3.4932377 3.5244212 3.5534897 3.5802987 3.6047153 3.6266057 3.6458435 3.6623113 3.675904 3.6865313 3.6941206 3.698619 3.7 3.6999977 3.6992717 3.6972766 3.694048 3.6896207 3.6840312 3.677315 3.669508 3.660646 3.650765 3.6399004 3.6280875 3.6153615 3.601757 3.5873086 3.57205 3.5560148 3.539236 3.5217462 3.5035772 3.4847605 3.465327 3.4453065 3.4247289 3.4036229 3.3820171 3.3599389 3.337415 3.314472 3.2911355 3.2674303 3.2433805 3.21901 3.1943414 3.169397 3.1441984 3.1187663 3.093121 3.067282 3.0412683 3.015098 2.9887893 2.9623587 2.935823 2.9091976 2.882498 2.855739 2.828935 2.802099 2.7752445 2.7483835 2.7215288 2.6946914 2.6678824 2.6411126 2.6143916 2.5877297 2.5611358 2.5346186 2.5081868 2.4818482 2.4556105 2.4294806 2.4034657 2.3775725 2.3518066 2.3261743 2.3006809 2.2753317 2.2501316 2.2250853 2.200197 2.1754708 2.1509106 2.12652 2.102302 2.0782602 2.054397 2.0307157 2.007218 1.9839066 1.9607834 1.9378504 1.9151092 1.8925612 1.8702081 1.848051 1.8260907 1.8043284 1.7827649 1.7614008 1.7402365 1.7192726 1.6985092 1.6779467 1.6575849 1.6374241 1.617464 1.5977044 1.578145 1.5587856 1.5396255 1.5206643 1.5019015 1.4833362 1.464968 1.4467958 1.428819 1.4110365 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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="3.7" PeakHeight="300.939" Num="5" zHalfNm="269.27" Error="1.232">
-83.439 -4.056 2.704 -1.543 0.706
</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="6515.104" A="-1.23354882E11" B="3.8072492E7" C="-2937.5671" Error="0.00171"/>
<QuasiParabolic ID="2" StartDistance="6515.104" EndDistance="6550.207" A="0.0" B="2453.5334" C="-0.3365614" Error="0.0497"/>
<QuasiParabolic ID="3" StartDistance="6550.207" EndDistance="6582.0" A="8.1476951E9" B="-2586437.0" C="205.00154" Error="0.0497"/>
<QuasiParabolic ID="4" StartDistance="6582.0" EndDistance="6584.0" A="1.2092569E12" B="-3.67554304E8" C="27929.693" Error="0.00137"/>
<QuasiParabolic ID="5" StartDistance="6584.0" EndDistance="6607.0" A="2.69463034E12" B="-8.1876128E8" C="62195.11" Error="0.056"/>
<QuasiParabolic ID="6" StartDistance="6607.0" EndDistance="6615.0" A="8.4617325E12" B="-2.56451661E9" C="194309.17" Error="0.00987"/>
<QuasiParabolic ID="7" StartDistance="6615.0" EndDistance="6655.0" A="4.4601663E12" B="-1.35467034E9" C="102861.99" Error="0.0365"/>
<QuasiParabolic ID="8" StartDistance="6655.0" EndDistance="6670.939" A="-1.98797448E13" B="5.9601039E9" C="-446707.84" Error="0.0085"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="105.311" Depth="0.154"/>
<TopsideChapman PeakHeight="300.939" PeakDensity="169851.11" PeakScaleHeight="23.521" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
