<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 04:35:00.000"
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, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.18 (108) 04:35:00</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">
FF202610804180435001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.525" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.352" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.814" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.975" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.975" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.425" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="282.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="282.500" 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="0.625" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.300" 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="2.975" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.975" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="285.890" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="260.722" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.393" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="36.099" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.260" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="19.093" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="35.540" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.210" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="23">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
282.500 284.167 285.833 287.500 290.000 292.500 292.500 295.000 297.500 300.000 305.000 305.000 307.500 310.000 320.000 325.000 327.500 330.000 332.500 340.828 353.276 373.911 414.763
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 75 75 75 93 93 84 81 111 111 81 84 93 93 96 90 90 99 96 90 90
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="488">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 147.213 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 184.426 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 221.639 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 285.89 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0
</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 0.35362422 0.35321164 0.35265058 0.35186794 0.350941 0.34979865 0.3485186 0.34703198 0.34534484 0.34353513 0.34146762 0.33922264 0.33680937 0.33423752 0.33138627 0.32840315 0.32511154 0.32165998 0.31800663 0.31405962 0.30991048 0.30548292 0.3007702 0.29580057 0.2905147 0.28490174 0.27905643 0.27276435 0.26612034 0.25904986 0.25152445 0.24354924 0.235001 0.22594312 0.21623978 0.20586789 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 0.2 0.2 0.2 0.2 0.2 0.20237541 0.20651375 0.21065208 0.21479042 0.21892875 0.2230671 0.22720544 0.23134378 0.23548211 0.23962046 0.2437588 0.24789713 0.25203547 0.25617382 0.26031214 0.2644505 0.26858884 0.27272716 0.2768655 0.28100383 0.28514218 0.28928053 0.29341885 0.2975572 0.30169553 0.30583388 0.30997223 0.31411055 0.3182489 0.32238722 0.32652557 0.33066392 0.33480224 0.3389406 0.3430789 0.34721726 0.3513556 0.354 0.36289993 0.38870755 0.41617692 0.44526166 0.47591287 0.5081026 0.54179966 0.57698095 0.6136423 0.65178007 0.6914131 0.73256403 0.7752478 0.8195029 0.8653627 0.9128649 0.9620497 1.0129482 1.0656052 1.1200386 1.1762948 1.234371 1.2942791 1.3560241 1.419585 1.4849133 1.5519813 1.620683 1.6909297 1.762615 1.8355591 1.909596 1.9845293 2.0601237 2.1361437 2.2123299 2.2883828 2.3640296 2.4389997 2.5129893 2.5857215 2.6569383 2.7263849 2.7938216 2.8590448 2.9218543 2.9820805 3.039565 3.0941854 3.1458285 3.1943936 3.2398057 3.2819998 3.3209105 3.3565116 3.388751 3.4176075 3.4430594 3.4650924 3.483693 3.4988527 3.5105667 3.5188265 3.5236306 3.525 3.5249887 3.5238507 3.5208933 3.5161798 3.5097737 3.5017385 3.4921386 3.4810376 3.468499 3.4545856 3.4393601 3.4228845 3.4052188 3.3864236 3.3665576 3.3456783 3.3238423 3.3011045 3.2775195 3.253139 3.2280145 3.2021956 3.1757305 3.148666 3.121047 3.0929174 3.0643198 3.0352945 3.0058808 2.976117 2.946039 2.9156816 2.885079 2.8542628 2.823264 2.7921119 2.7608347 2.7294595 2.6980119 2.666516 2.6349952 2.603472 2.571967 2.5405002 2.5090904 2.4777558 2.446513 2.415378 2.384366 2.353491 2.3227665 2.2922049 2.261818 2.2316165 2.201611 2.171811 2.1422255 2.1128626 2.0837297 2.0548344 2.0261831 1.9977815 1.9696352 1.9417493 1.9141283 1.8867761 1.8596966 1.8328929 1.8063679 1.7801242 1.7541639 1.7284888 1.7031006 1.6780005 1.6531893 1.6286678 1.6044365 1.5804957 1.5568452 1.5334849 1.5104145 1.4876331 1.4651402 1.4429349 1.4210159 1.399382 1.3780321 1.3569643 1.3361775 1.3156695 1.2954389 1.2754835 1.2558014 1.2363906 1.2172488 1.1983739 1.1797636 1.1614155 1.1433272 1.1254964 1.1079205 1.090597 1.0735234 1.0566971 1.0401154 1.0237758 1.0076755 0.991812 0.9761825 0.9607843 0.9456148 0.9306713 0.91595095 0.9014511 0.8871691 0.87310225 0.8592478 0.84560305 0.8321653 0.81893194 0.8059003 0.79306763 0.7804314 0.7679889 0.7557376 0.74367493 0.73179823 0.720105 0.7085927 0.6972588 0.6861008 0.67511624 0.6643027 0.65365773 0.64317894 0.6328639 0.6227103 0.6127157 0.602878 0.5931948 0.58366376 0.57428277 0.5650495 0.5559619 0.54701775 0.5382149 0.52955127 0.52102476 0.51263326 0.50437486 0.49624747 0.4882491 0.48037782 0.4726317 0.46500883 0.4575073 0.45012534 0.44286102 0.43571258 0.4286782 0.42175618 0.41494474 0.4082422 0.40164685 0.39515704 0.38877112 0.38248748 0.3763045 0.37022066 0.3642344 0.35834414 0.35254842 0.34684578 0.3412347 0.33571377 0.3302816 0.32493675 0.31967786 0.31450355 0.30941254 0.30440345 0.299475 0.29462597 0.289855 0.28516093 0.28054252 0.27599856 0.2715279 0.2671293 0.26280168 0.25854388 0.25435477 0.2502333 0.24617837 0.24218892 0.23826388 0.23440225 0.23060301 0.22686514 0.2231877 0.21956968 0.21601014 0.21250816 0.2090628 0.20567316 0.20233834 0.19905746 0.19582966 0.19265407 0.18952988 0.18645625 0.18343234 0.1804574 0.1775306 0.17465119 0.17181839 0.16903147 0.16628967 0.16359228 0.16093858 0.15832785 0.15575941 0.15323257 0.15074669 0.14830106 0.14589506 0.14352806 0.14119941 0.13890849 0.1366547 0.13443744 0.13225612 0.13011016 0.12799898 0.12592202 0.12387873 0.12186857 0.119891 0.11794549 0.116031535 0.1141486 0.11229621 0.11047386 0.108681045 0.10691732 0.10518219 0.103475206 0.101795904 0.10014384 0.09851857 0.09691967 0.0953467 0.09379924 0.092276886 0.09077923 0.08930587 0.087856404 0.08643046 0.08502765 0.083647594 0.082289934 0.08095429 0.07964033 0.07834768 0.07707601 0.07582497 0.07459422 0.07338346 0.07219233 0.071020536 0.06986775 0.06873368 0.067618005 0.06652044 0.06544068 0.06437844 0.063333444 0.062305406 0.061294053 0.06029911 0.059320316 0.058357403 0.05741012 0.05647821 0.055561427 0.05465952 0.053772252 0.052899383 0.05204068 0.05119592 0.050364867

</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="285.89" Num="5" zHalfNm="260.722" Error="1.183">
-64.737 1.308 -1.398 0.797 -0.221
</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="6517.213" A="-1.09832749E11" B="3.3898996E7" C="-2615.538" Error="0.00178"/>
<QuasiParabolic ID="2" StartDistance="6517.213" EndDistance="6554.426" A="0.0" B="-3359.3364" C="0.5554919" Error="0.0741"/>
<QuasiParabolic ID="3" StartDistance="6554.426" EndDistance="6580.0" A="9.5506629E10" B="-2.917084E7" C="2227.4727" Error="0.0741"/>
<QuasiParabolic ID="4" StartDistance="6580.0" EndDistance="6588.0" A="-3.03699952E11" B="9.2168544E7" C="-6992.8457" Error="0.0348"/>
<QuasiParabolic ID="5" StartDistance="6588.0" EndDistance="6604.0" A="3.55527898E12" B="-1.07934912E9" C="81920.15" Error="0.0775"/>
<QuasiParabolic ID="6" StartDistance="6604.0" EndDistance="6619.0" A="9.8902496E12" B="-2.99787418E9" C="227174.94" Error="0.0298"/>
<QuasiParabolic ID="7" StartDistance="6619.0" EndDistance="6637.0" A="1.12840095E13" B="-3.41901338E9" C="258987.83" Error="0.0349"/>
<QuasiParabolic ID="8" StartDistance="6637.0" EndDistance="6655.89" A="-2.18410202E13" B="6.5629148E9" C="-493003.16" Error="0.0123"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="111.639" Depth="0.154"/>
<TopsideChapman PeakHeight="285.89" PeakDensity="154164.08" PeakScaleHeight="19.093" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
