<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-29 -119 02:55:00.000"
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: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.29 (119) 02:55:00</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">
FF202611904290255001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.139" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.889" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.725" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.725" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.475" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="323.819" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="323.819" 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="0.025" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="357.500" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.725" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.725" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="309.421" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.905" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.672" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="49.414" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.375" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="26.055" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="49.340" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
323.819 325.383 327.112 329.032 331.178 333.592 337.500 340.000 342.500 347.500 352.500 357.500 365.000 375.000 387.500 402.500 422.500 456.117
</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 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 -1.5625 -1.5625 -10.9375 -1.5625 -1.5625 4.6875 -4.6875 -1.5625 -1.5625 1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="608">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 147.47034 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 184.94067 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 222.411 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 309.421 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0 508.0 509.0 510.0 511.0 512.0 513.0 514.0 515.0 516.0 517.0 518.0 519.0 520.0 521.0 522.0 523.0 524.0 525.0 526.0 527.0 528.0 529.0 530.0 531.0 532.0 533.0 534.0 535.0 536.0 537.0 538.0 539.0 540.0 541.0 542.0 543.0 544.0 545.0 546.0 547.0 548.0 549.0 550.0 551.0 552.0 553.0 554.0 555.0 556.0 557.0 558.0 559.0 560.0 561.0 562.0 563.0 564.0 565.0 566.0 567.0 568.0 569.0 570.0 571.0 572.0 573.0 574.0 575.0 576.0 577.0 578.0 579.0 580.0 581.0 582.0 583.0 584.0 585.0 586.0 587.0 588.0 589.0 590.0 591.0 592.0 593.0 594.0 595.0 596.0 597.0 598.0 599.0 600.0 601.0 602.0 603.0 604.0 605.0 606.0 607.0 608.0 609.0 610.0 611.0 612.0 613.0 614.0 615.0 616.0 617.0 618.0 619.0 620.0 621.0 622.0 623.0 624.0 625.0 626.0 627.0 628.0 629.0 630.0 631.0 632.0 633.0 634.0 635.0 636.0 637.0 638.0 639.0 640.0 641.0 642.0 643.0 644.0 645.0 646.0 647.0 648.0 649.0 650.0 651.0 652.0 653.0 654.0 655.0 656.0 657.0 658.0 659.0 660.0 661.0 662.0 663.0 664.0 665.0 666.0 667.0 668.0 669.0 670.0 671.0 672.0 673.0 674.0 675.0 676.0 677.0 678.0 679.0 680.0 681.0 682.0 683.0 684.0 685.0 686.0 687.0 688.0 689.0 690.0 691.0 692.0 693.0 694.0 695.0 696.0
</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 0.35369936 0.35321155 0.35265046 0.35186782 0.3509409 0.34987223 0.3485916 0.34710422 0.34548807 0.3436766 0.3416772 0.33942887 0.33708012 0.33450317 0.33171195 0.32872143 0.3255474 0.3221451 0.31853682 0.31462997 0.31051603 0.30617204 0.30158404 0.29667348 0.29152825 0.2860312 0.28019217 0.27404463 0.26750064 0.26054624 0.253244 0.24541861 0.23703568 0.2281746 0.21868218 0.20857483 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 0.20024386 0.20435378 0.2084637 0.2125736 0.21668352 0.22079344 0.22490336 0.22901328 0.2331232 0.23723312 0.24134304 0.24545296 0.24956287 0.25367278 0.2577827 0.26189262 0.26600254 0.27011245 0.27422237 0.2783323 0.2824422 0.28655213 0.29066205 0.29477197 0.2988819 0.3029918 0.30710173 0.31121165 0.31532156 0.31943148 0.3235414 0.32765132 0.33176124 0.33587116 0.33998108 0.344091 0.34820092 0.35231084 0.354 0.3646819 0.3832759 0.4024582 0.42224115 0.44264647 0.46368408 0.48536775 0.507715 0.53074163 0.5544569 0.5788832 0.6040261 0.62990403 0.6565331 0.6839224 0.7120786 0.7410246 0.7707619 0.8012983 0.8326479 0.86480784 0.8977942 0.93160164 0.9662303 1.0016845 1.0379564 1.0750378 1.1129286 1.1516039 1.1910696 1.2312878 1.2722467 1.3139213 1.356289 1.3993076 1.4429574 1.487186 1.5319685 1.5772423 1.6229712 1.6691064 1.7155764 1.7623446 1.8093402 1.8565035 1.9037641 1.9510666 1.9983389 2.0455048 2.0925002 2.1392465 2.185685 2.231733 2.277327 2.3223882 2.3668463 2.4106429 2.4536939 2.4959433 2.5373209 2.5777729 2.6172307 2.655634 2.6929286 2.729056 2.7639654 2.7976172 2.829949 2.8609302 2.890505 2.9186418 2.9453022 2.9704523 2.9940574 3.0160866 3.0365121 3.0553112 3.0724645 3.0879416 3.1017327 3.1138158 3.1241791 3.1328108 3.1396995 3.1448383 3.1482213 3.149844 3.15 3.1498487 3.1488845 3.1470487 3.1443634 3.1408508 3.1365335 3.131434 3.1255746 3.118978 3.1116664 3.1036623 3.0949876 3.0856647 3.0757153 3.0651612 3.054024 3.0423248 3.0300844 3.017324 3.0040636 2.9903235 2.9761236 2.9614832 2.9464216 2.9309578 2.9151096 2.8988957 2.8823338 2.8654406 2.848234 2.8307297 2.8129444 2.7948937 2.7765934 2.758058 2.7393026 2.7203414 2.7011883 2.6818566 2.6623597 2.6427102 2.6229208 2.6030033 2.5829692 2.5628302 2.542597 2.5222805 2.5018907 2.4814377 2.460931 2.4403803 2.419794 2.3991811 2.37855 2.3579087 2.3372648 2.316626 2.2959993 2.2753918 2.2548103 2.2342608 2.2137496 2.1932826 2.1728656 2.152504 2.1322026 2.1119668 2.0918012 2.0717103 2.0516984 2.0317698 2.011928 1.9921771 1.9725206 1.9529619 1.9335042 1.9141504 1.8949035 1.8757662 1.8567411 1.8378305 1.8190367 1.8003621 1.7818084 1.7633774 1.7450713 1.7268913 1.708839 1.6909161 1.6731236 1.6554627 1.6379347 1.6205403 1.6032807 1.5861564 1.5691684 1.5523173 1.5356034 1.5190276 1.50259 1.486291 1.470131 1.45411 1.4382284 1.4224861 1.4068831 1.3914194 1.376095 1.3609098 1.3458636 1.330956 1.3161868 1.3015558 1.2870625 1.2727066 1.2584876 1.2444052 1.2304586 1.2166476 1.2029715 1.1894295 1.1760213 1.1627462 1.1496035 1.1365924 1.1237123 1.1109624 1.098342 1.0858504 1.0734866 1.06125 1.0491397 1.0371549 1.0252948 1.0135585 1.001945 0.9904536 0.97908336 0.9678334 0.95670277 0.9456906 0.9347959 0.9240179 0.9133555 0.9028079 0.89237404 0.8820531 0.87184405 0.86174595 0.8517579 0.8418789 0.83210796 0.82244426 0.8128868 0.8034345 0.7940866 0.784842 0.7756998 0.7666591 0.75771886 0.74887824 0.7401362 0.73149186 0.7229443 0.71449256 0.70613563 0.69787276 0.68970287 0.6816251 0.6736386 0.66574234 0.65793544 0.6502171 0.64258635 0.6350423 0.6275841 0.6202108 0.6129216 0.60571563 0.598592 0.5915498 0.5845883 0.5777066 0.5709038 0.5641791 0.5575318 0.5509609 0.54446566 0.5380453 0.53169894 0.52542585 0.51922524 0.51309633 0.5070383 0.5010504 0.49513194 0.48928204 0.48350003 0.47778514 0.47213665 0.4665538 0.4610359 0.45558223 0.45019203 0.44486466 0.4395994 0.43439555 0.42925245 0.42416936 0.41914567 0.41418073 0.4092738 0.4044243 0.39963156 0.39489496 0.39021382 0.38558754 0.3810155 0.37649712 0.37203172 0.36761874 0.3632576 0.35894766 0.3546884 0.3504792 0.34631947 0.34220868 0.33814627 0.3341317 0.33016434 0.32624376 0.32236934 0.31854057 0.31475696 0.31101793 0.30732304 0.3036717 0.30006346 0.2964978 0.29297423 0.2894923 0.28605148 0.2826513 0.2792913 0.27597103 0.27268997 0.26944774 0.26624385 0.26307783 0.2599493 0.25685775 0.2538028 0.25078404 0.247801 0.24485329 0.24194048 0.23906218 0.23621796 0.23340745 0.23063025 0.22788596 0.2251742 0.2224946 0.21984676 0.21723032 0.21464491 0.21209016 0.20956573 0.20707124 0.20460635 0.20217071 0.19976398 0.19738582 0.19503589 0.19271386 0.19041939 0.18815216 0.18591188 0.18369818 0.18151079 0.17934938 0.17721364 0.17510328 0.173018 0.17095749 0.16892147 0.16690964 0.16492173 0.16295744 0.16101651 0.15909865 0.1572036 0.15533106 0.1534808 0.15165254 0.14984602 0.14806099 0.14629719 0.14455436 0.14283226 0.14113064 0.13944928 0.13778791 0.1361463 0.13452424 0.13292147 0.13133778 0.12977292 0.12822668 0.12669885 0.12518921 0.12369753 0.1222236 0.12076721 0.11932817 0.11790625 0.11650126 0.11511299 0.11374125 0.11238584 0.11104657 0.10972324 0.10841567 0.10712367 0.10584705 0.10458563 0.10333924 0.10210769 0.1008908 0.0996884 0.09850033 0.0973264 0.096166454 0.09502032 0.093887836 0.09276885 0.09166318 0.09057069 0.08949121 0.088424586 0.08737067 0.0863293 0.08530035 0.08428365 0.08327906 0.08228644 0.081305645 0.08033653 0.07937897 0.07843281 0.07749793 0.076574184 0.07566144 0.07475958 0.07386846 0.07298796 0.072117954 0.07125831 0.07040891 0.06956963 0.06874035 0.06792095 0.06711132 0.06631134 0.06552088 0.06473985 0.06396813 0.0632056 0.06245216 0.061707698 0.060972106 0.060245283 0.059527118 0.058817517 0.05811637 0.057423577 0.056739043 0.05606267 0.05539435 0.054734003 0.054081522 0.05343682 0.0527998 0.052170373 0.051548447 0.050933935 0.050326746

</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="3.15" PeakHeight="309.421" Num="5" zHalfNm="274.905" Error="1.293">
-86.896 0.287 -0.767 0.408 -0.042
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="12" 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="6517.47" A="-1.08334539E11" B="3.3436586E7" C="-2579.8582" Error="0.00177"/>
<QuasiParabolic ID="2" StartDistance="6517.47" EndDistance="6554.941" A="0.0" B="-318.6827" C="0.08893681" Error="0.00799"/>
<QuasiParabolic ID="3" StartDistance="6554.941" EndDistance="6561.0" A="1.499957E11" B="-4.5811816E7" C="3498.0076" Error="0.02"/>
<QuasiParabolic ID="4" StartDistance="6561.0" EndDistance="6592.0" A="2.13641974E10" B="-6600869.0" C="509.8239" Error="0.0156"/>
<QuasiParabolic ID="5" StartDistance="6592.0" EndDistance="6593.0" A="1.15816708E13" B="-3.5139753E9" C="266542.47" Error="0.0"/>
<QuasiParabolic ID="6" StartDistance="6593.0" EndDistance="6594.0" A="-1.37691988E12" B="4.17039488E8" C="-31577.865" Error="2.74E-11"/>
<QuasiParabolic ID="7" StartDistance="6594.0" EndDistance="6598.0" A="1.47753704E12" B="-4.4873456E8" C="34070.754" Error="0.00537"/>
<QuasiParabolic ID="8" StartDistance="6598.0" EndDistance="6611.0" A="1.91238911E12" B="-5.8054784E8" C="44059.637" Error="0.012"/>
<QuasiParabolic ID="9" StartDistance="6611.0" EndDistance="6645.0" A="4.6758033E12" B="-1.4165527E9" C="107287.96" Error="0.0185"/>
<QuasiParabolic ID="10" StartDistance="6645.0" EndDistance="6662.0" A="-1.41846538E12" B="4.17689184E8" C="-30728.736" Error="0.00765"/>
<QuasiParabolic ID="11" StartDistance="6662.0" EndDistance="6679.421" A="-1.04068767E13" B="3.11610163E9" C="-233251.44" Error="0.0033"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="112.411" Depth="0.154"/>
<TopsideChapman PeakHeight="309.421" PeakDensity="123107.94" PeakScaleHeight="26.055" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
