<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-05 -095 18:10:00.000"
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="18.0">
<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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2o cusp</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" >
2026.04.05 (095) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609504051810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.557" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.410" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.700" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.910" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="110.618" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.415" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.192" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.982" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.165" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="374.879" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.106" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.806" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="147.892" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.355" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.775" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="169.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="155">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 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 11.3 11.35 11.4 11.45 11.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 215.000 220.000 222.500 225.000 230.000 235.000 235.000 235.000 237.500 240.000 250.000 250.000 252.500 255.000 260.000 260.000 265.000 270.000 275.000 280.000 280.000 282.500 285.000 290.000 290.000 292.500 295.000 295.000 297.500 300.000 300.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 330.000 330.000 330.000 330.000 340.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 342.500 345.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 372.500 375.000 377.500 380.000 380.000 380.000 385.000 385.000 387.500 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 445.000 450.000 450.000 452.500 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 480.000 480.000 480.000 485.000 487.500 492.931 498.793 505.138 512.028 519.538 527.755 536.784 546.751 557.810 570.151 584.011 599.689 617.568 638.146 662.083
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 48 0 48 51 45 57 57 0 0 60 60 0 54 60 63 63 63 0 45 54 0 48 45 54 0 54 60 51 63 63 66 63 63 66 63 57 0 0 0 60 51 63 63 63 57 69 69 60 0 0 0 63 69 0 72 66 51 60 0 57 72 66 66 63 0 72 66 66 63 57 0 60 63 63 69 0 63 66 69 63 75 60 66 0 63 63 66 60 60 51 51 60 60 51 57 60 60 66 54 60 66 63 66 60 66 60 63 51 57 66 72 72 57 63 72 75 66 51 57 57 57 54 51 0 54 0 48 54 51 54 54 48 54 51 51 51 51 0 51 0 0 0 0 0 0 0 45 45 45 42 0 42 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 -1.953125 -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 -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 -2.734375 -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 -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 2.734375 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 -0.390625 1.953125 -0.390625 0.390625 -0.390625 0.390625 2.734375 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.7 2.75 2.8 2.85 2.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.618 111.641 112.772 114.036 115.474
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51 0 48
</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
</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" >
90.0 95.0 100.0 100.415 103.715 105.0 107.014 110.0 110.314 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 374.879 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.466 2.908 2.91 2.791 2.791 2.791 2.899 2.91 3.03 3.155 3.278 3.402 3.527 3.654 3.783 3.916 4.051 4.19 4.333 4.481 4.633 4.79 4.952 5.119 5.291 5.467 5.649 5.835 6.025 6.22 6.418 6.62 6.824 7.031 7.24 7.45 7.661 7.873 8.085 8.297 8.508 8.718 8.927 9.133 9.338 9.539 9.737 9.931 10.12 10.303 10.48 10.648 10.807 10.955 11.089 11.208 11.31 11.392 11.452 11.488 11.5 11.5 11.496 11.483 11.462 11.434 11.399 11.356 11.307 11.252 11.191 11.125 11.053 10.976 10.895 10.81 10.72 10.627 10.53 10.43 10.328 10.222 10.115 10.005 9.893 9.779 9.664 9.547 9.429 9.311 9.191 9.071 8.95 8.829 8.707 8.586 8.464 8.343 8.222 8.101 7.98 7.86 7.741 7.622 7.504 7.387 7.27 7.155 7.04 6.927 6.814 6.703 6.592 6.483 6.375 6.268 6.162 6.058 5.955 5.853 5.752 5.653 5.555 5.459 5.363 5.269 5.176 5.085 4.995 4.906 4.819 4.733 4.648 4.564 4.482 4.401 4.322 4.243 4.166 4.09 4.016 3.942 3.87 3.799 3.729 3.661 3.593 3.527 3.462 3.397 3.334 3.273 3.212 3.152 3.093 3.036 2.979 2.923 2.869 2.815 2.762 2.71 2.659 2.609 2.56 2.512 2.465 2.419 2.373 2.328 2.284 2.241 2.199 2.157 2.116 2.076 2.037 1.998 1.961 1.923 1.887 1.851 1.816 1.782 1.748 1.714 1.682

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.91" PeakHeight="100.415" Num="3" Error="4.024">
-15.348 6.416 -1.483
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.91" EndFrequency="11.5" PeakHeight="374.879" Num="5" zHalfNm="266.106" Error="4.618">
-229.724 -40.779 6.997 -2.72 1.661
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.899" Depth="0.119"/>
<TopsideChapman PeakHeight="374.879" PeakDensity="1640818.9" PeakScaleHeight="80.775" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
