<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 15:30:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="15.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" 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.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.16 (289) 15:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202628910161530009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.220" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.870" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="591.913" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.377" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.355" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="428.771" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.340" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.077" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="199.947" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="68.313" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="110.669" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="246.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="99">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 367.500 370.000 370.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 385.000 385.000 387.500 390.000 390.000 393.606 397.211 400.817 404.422 408.028 411.634 415.239 418.845 422.450 426.056 429.662 433.267 436.873 440.478 444.084 447.689 451.295 454.901 458.506 462.112 465.717 469.323 472.929 476.534 480.140 483.745 487.351 490.957 494.562 498.168 501.773 505.379 508.985 512.590 516.196 519.801 523.407 527.013 530.618 534.224 537.829 541.435 545.040 548.646 552.252 555.857 559.463 563.068 566.674 570.280 573.885 577.491 581.096 584.702 588.308 591.913 595.519 599.124 603.611 608.509 615.000 620.000 625.000 635.000 640.000 650.000 660.000 675.000 685.000 705.000 720.000 745.000 775.000 809.575
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 54 66 60 66 63 54 63 60 0 66 63 66 66 0 66 69 66 0 0 66 69 63 69 72 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -1.953125 2.734375 1.171875 2.734375 -0.390625 2.734375 -2.734375 1.953125 -1.171875 1.171875 2.734375 -1.953125 -1.953125 -2.734375 -1.171875 -2.734375 -1.171875 -1.953125 -1.171875 -1.171875 2.734375 1.953125 -2.734375 -1.171875 1.953125 -0.390625 1.171875 -0.390625 -0.390625 -2.734375 -0.390625 -1.953125 -0.390625 1.171875 -2.734375 -1.953125 -1.171875 -2.734375 1.953125 -1.953125 -0.390625 -1.953125 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.485 90.0 95.0 100.0 105.0 110.0 111.602 113.205 114.807 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 428.771 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.272 2.922 3.267 3.377 3.254 3.254 3.377 3.383 3.527 3.662 3.793 3.92 4.047 4.172 4.298 4.423 4.549 4.676 4.804 4.933 5.063 5.193 5.325 5.457 5.59 5.723 5.857 5.991 6.125 6.26 6.394 6.529 6.663 6.797 6.931 7.064 7.197 7.329 7.461 7.592 7.723 7.853 7.983 8.112 8.24 8.367 8.494 8.62 8.745 8.87 8.993 9.116 9.237 9.357 9.476 9.593 9.709 9.822 9.933 10.041 10.145 10.245 10.34 10.428 10.509 10.581 10.642 10.691 10.726 10.745 10.75 10.75 10.747 10.739 10.728 10.713 10.694 10.671 10.645 10.616 10.583 10.547 10.508 10.467 10.422 10.375 10.325 10.273 10.218 10.162 10.103 10.042 9.979 9.915 9.849 9.781 9.712 9.641 9.569 9.496 9.422 9.347 9.271 9.193 9.115 9.037 8.957 8.877 8.797 8.716 8.634 8.552 8.47 8.388 8.305 8.222 8.14 8.057 7.974 7.891 7.808 7.725 7.643 7.56 7.478 7.396 7.314 7.233 7.152 7.071 6.991 6.911 6.831 6.752 6.673 6.595 6.518 6.44 6.364 6.288 6.212 6.137 6.063 5.989 5.915 5.843 5.771 5.699 5.629 5.558 5.489 5.42 5.352 5.284 5.217 5.151 5.085 5.02 4.956 4.892 4.829 4.767 4.705 4.644 4.584 4.524 4.465 4.406 4.348 4.291 4.235 4.179 4.124 4.069 4.015 3.962 3.909 3.857 3.806 3.755 3.705 3.655 3.606 3.558 3.51 3.463

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.377" PeakHeight="110.0" Num="3" Error="0.0">
-30.491 13.137 -3.161
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.377" EndFrequency="10.75" PeakHeight="428.771" Num="5" zHalfNm="275.34" Error="3.346">
-280.008 -52.236 22.547 -6.304 2.037
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.807" Depth="0.123"/>
<TopsideChapman PeakHeight="428.771" PeakDensity="1433777.9" PeakScaleHeight="110.669" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
