<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 21:00:00.000"
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: 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>
<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" >
2026.10.17 (290) 21:00:00</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">
FF202629010172100009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.565" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.854" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="496.925" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.814" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="404.571" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="325.189" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.164" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.272" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.642" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.191" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.890" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="133">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 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 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 325.000 325.000 325.000 330.000 330.000 328.750 327.500 326.250 325.000 330.000 331.250 332.500 333.750 335.000 336.250 337.500 338.750 340.000 340.000 339.000 338.000 337.000 336.000 335.000 335.000 340.000 345.000 340.000 340.000 350.000 350.000 355.000 355.000 352.500 350.000 350.000 350.000 350.000 350.000 352.500 355.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 366.808 368.616 370.423 372.231 374.039 375.847 377.655 379.463 381.270 383.078 384.886 386.694 388.502 390.310 392.117 393.925 395.733 397.541 399.349 401.157 402.964 404.772 406.580 408.388 410.196 412.003 413.811 415.619 417.427 419.235 421.043 422.850 424.658 426.466 428.274 430.082 431.890 433.697 435.505 437.313 439.121 440.929 442.736 444.544 446.352 448.160 449.968 451.776 453.583 455.391 457.199 459.007 460.815 462.623 464.430 466.238 468.046 469.854 471.662 473.470 475.277 477.085 478.893 480.701 482.509 484.316 487.035 490.015 493.296 496.925 500.961 505.478 510.000 515.000 525.000 530.000 540.000 550.000 565.000 580.000 600.000 623.512
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 69 0 66 63 60 0 0 0 72 63 0 63 0 0 0 0 0 63 66 0 0 0 0 0 0 0 78 78 0 69 66 57 63 0 78 0 69 0 0 0 72 75 66 63 0 72 0 0 69 75 0 0 66 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 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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 2.734375 -0.390625 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -2.734375 -2.734375 -1.171875 1.171875 -1.953125 -2.734375 -2.734375 0.390625 -2.734375 0.390625 0.390625 1.953125 1.171875 -0.390625 0.390625 -2.734375 -1.171875 0.390625 1.171875 1.171875 0.390625 1.953125 1.171875 -1.171875 1.953125 1.171875 0.390625 -2.734375 -1.953125 0.390625 0.390625 -2.734375 2.734375 1.953125 -1.953125 -2.734375 2.734375 -2.734375 1.953125 1.171875 -1.953125 2.734375 -1.171875 0.390625 -0.390625 -1.171875 -0.390625 -1.953125 -2.734375 -1.953125 1.171875 0.390625 2.734375 -1.953125 -0.390625 -2.734375 -0.390625 -2.734375 -0.390625 -2.734375 0.390625 -0.390625 -2.734375 1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.523 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.601 135.0 140.0 145.0 150.0 155.0 155.201 160.0 165.0 170.0 175.0 177.802 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 404.571 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.541 0.705 0.788 0.814 0.801 0.761 0.69 0.577 0.49 0.49 0.49 0.49 0.49 0.49 0.49 0.559 0.63 0.702 0.774 0.814 0.866 0.981 1.1 1.225 1.358 1.5 1.653 1.819 1.998 2.19 2.396 2.616 2.849 3.095 3.353 3.622 3.9 4.187 4.481 4.781 5.087 5.398 5.712 6.028 6.347 6.667 6.988 7.308 7.627 7.943 8.256 8.565 8.867 9.162 9.447 9.721 9.981 10.224 10.449 10.651 10.829 10.979 11.098 11.184 11.235 11.25 11.25 11.241 11.217 11.179 11.129 11.066 10.991 10.907 10.812 10.708 10.597 10.478 10.352 10.22 10.083 9.941 9.795 9.645 9.493 9.337 9.18 9.021 8.86 8.699 8.537 8.374 8.212 8.05 7.889 7.728 7.569 7.411 7.254 7.098 6.944 6.792 6.642 6.494 6.347 6.203 6.062 5.922 5.785 5.65 5.517 5.387 5.259 5.134 5.01 4.89 4.772 4.656 4.542 4.431 4.323 4.216 4.112 4.01 3.911 3.814 3.718 3.625 3.535 3.446 3.359 3.275 3.192 3.111 3.032 2.955 2.88 2.807 2.736 2.666 2.598 2.531 2.467 2.404 2.342 2.282 2.223 2.166 2.111 2.056 2.003 1.952 1.901 1.852 1.805 1.758 1.713 1.668 1.625 1.583 1.542 1.502 1.463 1.426 1.389 1.353 1.318 1.283 1.25 1.218 1.186 1.155 1.125 1.096 1.068 1.04 1.013 0.987 0.961 0.936 0.912 0.888 0.865 0.842 0.821 0.799

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.814" PeakHeight="110.0" Num="3" Error="0.0">
-25.501 6.969 -0.945
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.814" EndFrequency="11.25" PeakHeight="404.571" Num="5" zHalfNm="325.189" Error="2.58">
-222.36 -9.317 6.78 -3.394 1.522
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="67.802" Depth="0.324"/>
<TopsideChapman PeakHeight="404.571" PeakDensity="1570254.4" PeakScaleHeight="59.191" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
