<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 18:20:00.000"
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="12.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.10.20 (293) 18:20:00</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">
FF202629310201820009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.519" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.181" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="8.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="477.270" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.847" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="376.472" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="244.282" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.235" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="179.351" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.680" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="98.193" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="196.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="54">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 387.500 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 457.543 460.262 463.176 466.306 469.679 473.322 477.270 481.562 486.247 491.380 497.029 503.276 510.221 517.987 526.731 536.648 547.991 561.094 576.398 594.511 616.282 642.946 676.360 719.458 777.165
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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
</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 1.171875 -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 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -1.171875 -2.734375 -1.953125 0.390625 -0.390625
</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" >
89.572 90.0 95.0 100.0 105.0 110.0 113.913 115.0 117.825 120.0 121.738 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.472 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.913 2.465 2.755 2.847 2.725 2.725 2.725 2.793 2.847 2.938 3.079 3.222 3.367 3.514 3.665 3.818 3.974 4.132 4.293 4.456 4.621 4.787 4.955 5.124 5.294 5.464 5.634 5.804 5.974 6.144 6.313 6.48 6.647 6.812 6.975 7.137 7.296 7.453 7.608 7.759 7.908 8.053 8.194 8.332 8.464 8.592 8.715 8.832 8.942 9.046 9.143 9.232 9.312 9.384 9.446 9.498 9.539 9.57 9.591 9.6 9.6 9.599 9.593 9.583 9.568 9.549 9.526 9.499 9.468 9.433 9.395 9.354 9.309 9.262 9.211 9.158 9.102 9.044 8.984 8.921 8.856 8.79 8.721 8.651 8.58 8.507 8.432 8.357 8.28 8.202 8.124 8.044 7.964 7.883 7.802 7.72 7.638 7.555 7.472 7.389 7.306 7.222 7.139 7.055 6.972 6.889 6.805 6.723 6.64 6.558 6.476 6.394 6.313 6.232 6.151 6.071 5.992 5.913 5.835 5.757 5.68 5.603 5.527 5.452 5.377 5.303 5.23 5.158 5.086 5.014 4.944 4.874 4.805 4.737 4.669 4.603 4.537 4.471 4.407 4.343 4.28 4.217 4.156 4.095 4.035 3.975 3.917 3.859 3.802 3.745 3.69 3.635 3.58 3.527 3.474 3.422 3.371 3.32 3.27 3.22 3.172 3.124 3.076 3.03 2.984 2.938 2.893 2.849 2.806 2.763 2.721 2.679 2.638 2.597 2.557 2.518 2.479 2.441 2.404 2.367 2.33 2.294 2.259 2.224 2.189 2.155

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.847" PeakHeight="110.0" Num="3" Error="0.0">
-30.063 12.509 -2.874
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.847" EndFrequency="9.6" PeakHeight="376.472" Num="5" zHalfNm="244.282" Error="2.441">
-247.212 -11.713 5.556 -1.833 0.468
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.738" Depth="0.122"/>
<TopsideChapman PeakHeight="376.472" PeakDensity="1143424.4" PeakScaleHeight="98.193" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
