<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-29 -119 04:20:00.000"
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" >
2026.04.29 (119) 04:20:00</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">
FF202611904290420001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.225" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.260" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.513" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.525" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.525" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="302.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="302.500" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="349.959" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.525" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.525" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="297.738" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.607" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.408" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="41.750" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.210" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="21.668" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="42.720" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.900" 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" >
2.525 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
302.500 305.000 305.000 305.000 306.719 308.438 310.156 311.875 313.594 315.313 317.031 318.750 320.469 322.188 323.906 325.625 327.344 329.063 330.781 332.500 338.333 344.167 350.000 352.500 347.500 349.959 354.047 362.184 386.297
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 42 42 45 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 0 0 90 90 78 93 99 96 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 -10.9375 1.5625 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -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="533">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 147.383 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 184.766 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 222.149 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 297.738 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0 577.0 578.0 579.0 580.0 581.0 582.0 583.0 584.0 585.0 586.0 587.0 588.0 589.0 590.0 591.0 592.0 593.0 594.0 595.0 596.0 597.0 598.0 599.0 600.0 601.0 602.0 603.0 604.0 605.0 606.0 607.0 608.0 609.0 610.0 611.0 612.0 613.0 614.0 615.0 616.0 617.0 618.0 619.0 620.0 621.0
</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 0.3471045 0.34541655 0.34360594 0.3416075 0.33936033 0.3370127 0.3343701 0.33158168 0.3285941 0.3254232 0.32196304 0.31836012 0.3144591 0.31029543 0.3059601 0.30127776 0.296382 0.29115817 0.28568336 0.27978426 0.27359006 0.26701438 0.26004463 0.25262702 0.2447895 0.23634772 0.22743827 0.2178724 0.20764464 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 0.20096397 0.20508349 0.209203 0.21332252 0.21744205 0.22156157 0.22568108 0.22980061 0.23392013 0.23803964 0.24215916 0.24627869 0.2503982 0.25451773 0.25863725 0.26275676 0.26687628 0.2709958 0.2751153 0.27923483 0.28335437 0.2874739 0.2915934 0.29571292 0.29983243 0.30395195 0.30807146 0.312191 0.31631052 0.32043004 0.32454956 0.32866907 0.3327886 0.3369081 0.34102765 0.34514716 0.34926668 0.3533862 0.354 0.37392715 0.39726156 0.42079872 0.4447711 0.4693446 0.4946522 0.5208002 0.5478944 0.5760243 0.60525316 0.6356535 0.66728145 0.70017207 0.73436856 0.7698833 0.80671793 0.84486336 0.8843047 0.92499435 0.96689814 1.0099422 1.0540669 1.0991925 1.1452534 1.192141 1.2398016 1.2881321 1.3370591 1.3865004 1.4363931 1.4866581 1.5372413 1.5880716 1.6391007 1.6902692 1.7415433 1.7928585 1.8441906 1.8954843 1.9466983 1.9978023 2.0487545 2.0995207 2.1500535 2.2003105 2.2502582 2.299846 2.3490286 2.3977554 2.4459743 2.4936292 2.5406456 2.5869787 2.6325405 2.6772532 2.7210407 2.7638113 2.8054645 2.845897 2.8849897 2.9226453 2.9587233 2.9930968 3.0256374 3.0562038 3.084654 3.1108491 3.134649 3.1559217 3.1745362 3.1903784 3.2033405 3.2133334 3.2202861 3.224149 3.225 3.2249541 3.2239447 3.221643 3.2180884 3.2133207 3.2073798 3.200306 3.192139 3.1829183 3.1726844 3.1614764 3.149333 3.1362934 3.1223958 3.1076775 3.092176 3.0759277 3.0589685 3.041334 3.023058 3.0041747 2.9847174 2.9647179 2.944208 2.9232178 2.901778 2.879917 2.8576634 2.8350444 2.8120866 2.788816 2.7652571 2.7414343 2.717371 2.6930897 2.668612 2.643959 2.6191509 2.594207 2.5691464 2.5439866 2.5187452 2.4934387 2.468083 2.4426932 2.4172843 2.3918698 2.3664632 2.3410776 2.3157246 2.290416 2.265163 2.239976 2.214865 2.1898394 2.1649082 2.14008 2.115363 2.0907645 2.0662923 2.0419524 2.0177517 1.9936962 1.9697914 1.9460428 1.9224551 1.899033 1.8757809 1.8527027 1.8298023 1.8070829 1.7845477 1.7621998 1.7400416 1.7180756 1.6963042 1.6747291 1.6533521 1.632175 1.6111989 1.5904253 1.5698549 1.5494887 1.5293274 1.5093715 1.4896215 1.4700778 1.4507402 1.431609 1.412684 1.3939649 1.3754516 1.3571435 1.3390403 1.3211411 1.3034455 1.2859527 1.2686617 1.2515718 1.2346818 1.2179909 1.2014979 1.1852016 1.1691009 1.1531945 1.1374812 1.1219596 1.1066283 1.0914859 1.0765309 1.061762 1.0471776 1.0327761 1.0185561 1.004516 0.9906541 0.97696894 0.9634588 0.950122 0.93695694 0.92396206 0.9111355 0.89847577 0.8859811 0.8736497 0.8614801 0.84947044 0.83761907 0.8259243 0.81438446 0.80299777 0.79176265 0.7806773 0.76974016 0.75894946 0.7483036 0.7378008 0.7274395 0.71721804 0.7071347 0.6971879 0.6873761 0.6776975 0.6681506 0.6587338 0.64944553 0.6402842 0.6312482 0.62233603 0.61354613 0.604877 0.59632707 0.5878949 0.579579 0.5713779 0.56329006 0.55531406 0.5474485 0.539692 0.53204304 0.5245003 0.51706237 0.5097279 0.5024955 0.4953639 0.4883317 0.48139766 0.47456044 0.46781877 0.46117136 0.45461696 0.44815436 0.44178233 0.4354996 0.42930505 0.42319745 0.41717562 0.4112384 0.4053847 0.39961335 0.3939232 0.3883132 0.38278225 0.37732926 0.37195316 0.3666529 0.3614275 0.35627583 0.35119691 0.34618983 0.3412535 0.33638695 0.33158928 0.3268595 0.32219666 0.3175999 0.3130682 0.30860075 0.3041966 0.2998549 0.29557478 0.29135537 0.28719583 0.28309536 0.27905306 0.2750682 0.27113992 0.26726747 0.26345003 0.25968686 0.25597718 0.25232026 0.24871534 0.24516171 0.24165863 0.2382054 0.23480134 0.23144571 0.22813788 0.22487713 0.22166283 0.21849433 0.21537095 0.21229208 0.20925708 0.20626535 0.20331626 0.2004092 0.1975436 0.19471887 0.1919344 0.18918967 0.18648408 0.18381709 0.18118815 0.17859674 0.17604229 0.1735243 0.17104225 0.16859563 0.16618395 0.16380668 0.16146336 0.1591535 0.15687664 0.15463229 0.15242 0.15023929 0.14808975 0.14597091 0.14388233 0.1418236 0.13979429 0.13779397 0.13582225 0.1338787 0.13196293 0.13007452 0.12821312 0.12637831 0.12456975 0.12278703 0.1210298 0.11929769 0.117590345 0.115907416 0.114248544 0.112613395 0.111001626 0.10941291 0.10784691 0.106303304 0.10478178 0.103282005 0.10180369 0.10034652 0.09891019 0.09749441 0.09609887 0.0947233 0.09336741 0.09203091 0.09071354 0.089415014 0.08813506 0.08687342 0.085629836 0.08440404 0.08319578 0.08200481 0.08083089 0.07967375 0.07853318 0.077408925 0.07630076 0.075208455 0.07413178 0.07307051 0.072024435 0.07099333 0.06997697 0.06897516 0.06798769 0.06701435 0.06605494 0.06510927 0.064177126 0.06325832 0.062352672 0.061459985 0.06058007 0.059712756 0.05885785 0.058015186 0.05718458 0.056365866 0.055558868 0.054763425 0.053979367 0.05320653 0.052444756 0.051693887 0.05095377 0.05022424

</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="3.225" PeakHeight="297.738" Num="5" zHalfNm="268.607" Error="0.869">
-74.028 -2.87 1.997 -1.171 0.483
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="8" 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="6517.383" A="-1.08839297E11" B="3.3592376E7" C="-2591.879" Error="0.00179"/>
<QuasiParabolic ID="2" StartDistance="6517.383" EndDistance="6554.766" A="0.0" B="-2774.093" C="0.46568313" Error="0.0616"/>
<QuasiParabolic ID="3" StartDistance="6554.766" EndDistance="6586.0" A="7.1060062E10" B="-2.1721182E7" C="1659.9348" Error="0.0616"/>
<QuasiParabolic ID="4" StartDistance="6586.0" EndDistance="6588.0" A="-1.2648798E12" B="3.83969632E8" C="-29139.55" Error="8.93E-4"/>
<QuasiParabolic ID="5" StartDistance="6588.0" EndDistance="6600.0" A="2.22626683E12" B="-6.7588058E8" C="51298.383" Error="0.0661"/>
<QuasiParabolic ID="6" StartDistance="6600.0" EndDistance="6652.0" A="4.6096659E12" B="-1.39812275E9" C="106013.7" Error="0.0504"/>
<QuasiParabolic ID="7" StartDistance="6652.0" EndDistance="6667.738" A="-1.71545744E13" B="5.1455452E9" C="-385843.5" Error="0.0099"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="112.149" Depth="0.154"/>
<TopsideChapman PeakHeight="297.738" PeakDensity="129040.016" PeakScaleHeight="21.668" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
