<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 17:10:00.000"
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="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.30 (089) 17:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608903301710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.513" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.029" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.220" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.281" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="375.428" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.357" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.151" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.350" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="124.243" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.899" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.520" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="173.640" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="134">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 278.000 281.000 284.000 287.000 290.000 295.000 300.000 305.000 310.000 315.000 320.000 320.000 325.000 325.000 330.000 335.000 335.000 337.500 340.000 345.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 360.000 361.667 363.333 365.000 365.000 367.500 370.000 370.000 370.000 372.500 375.000 377.500 380.000 382.500 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 392.500 395.000 397.500 400.000 402.500 405.000 405.000 405.000 410.000 411.667 413.333 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 432.500 435.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 455.000 455.000 455.000 455.000 460.000 461.667 463.333 465.000 465.000 465.000 465.000 465.000 467.500 470.000 472.500 475.000 475.000 477.500 480.000 485.000 485.000 485.000 490.000 492.500 495.000 500.000 500.000 505.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 535.000 540.000 545.000 551.981 560.325 570.473 583.083 599.173
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 48 51 0 0 51 54 54 60 54 54 0 51 48 0 48 51 48 0 45 51 57 51 54 54 51 0 0 48 45 0 57 54 48 0 0 0 0 0 51 0 57 57 57 0 57 57 0 0 0 0 0 54 54 60 54 0 0 57 63 60 60 63 57 63 63 57 60 57 0 60 51 57 63 66 60 63 63 66 63 60 63 60 60 57 60 54 51 57 0 0 54 0 57 54 48 0 0 0 54 54 0 48 42 48 51 45 0 51 45 54 48 54 51 54 54 54 54 51 51 54 54 54 51 51 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.953125 -1.171875 -2.734375 -1.953125 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 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 -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 -1.953125 -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 -1.171875 2.734375 -0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="12">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 100.000 100.000 100.000 105.000 104.167 103.333 102.500 101.667 100.833 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 57 57 54 0 0 0 0 0 54 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 0.390625 0.390625 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" >
89.509 90.0 95.0 100.0 105.0 110.0 112.259 114.517 115.0 116.776 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.428 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.166 2.787 3.115 3.22 3.098 3.098 3.124 3.22 3.33 3.494 3.651 3.804 3.954 4.103 4.25 4.397 4.543 4.689 4.836 4.983 5.131 5.28 5.43 5.581 5.734 5.888 6.043 6.2 6.359 6.52 6.683 6.847 7.014 7.183 7.355 7.528 7.705 7.883 8.065 8.249 8.436 8.627 8.82 9.016 9.215 9.417 9.623 9.831 10.042 10.255 10.47 10.686 10.901 11.112 11.317 11.509 11.68 11.819 11.913 11.95 11.95 11.945 11.929 11.901 11.863 11.815 11.758 11.692 11.618 11.536 11.447 11.351 11.249 11.141 11.029 10.911 10.789 10.663 10.534 10.402 10.266 10.129 9.989 9.848 9.704 9.56 9.415 9.269 9.123 8.976 8.829 8.683 8.536 8.39 8.245 8.101 7.957 7.814 7.672 7.532 7.393 7.255 7.119 6.984 6.85 6.718 6.588 6.46 6.333 6.208 6.085 5.964 5.844 5.727 5.611 5.497 5.385 5.274 5.166 5.059 4.954 4.852 4.75 4.651 4.554 4.458 4.364 4.272 4.182 4.093 4.006 3.921 3.837 3.755 3.675 3.596 3.518 3.443 3.369 3.296 3.225 3.155 3.087 3.02 2.954 2.89 2.827 2.766 2.705 2.646 2.588 2.532 2.477 2.422 2.369 2.317 2.267 2.217 2.168 2.121 2.074 2.028 1.984 1.94 1.897 1.856 1.815 1.775 1.736 1.697 1.66 1.623 1.587 1.552 1.518 1.485 1.452 1.42 1.388 1.358 1.328 1.298 1.269 1.241 1.214 1.187

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.22" PeakHeight="110.0" Num="3" Error="0.0">
-30.373 12.963 -3.081
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.22" EndFrequency="11.95" PeakHeight="375.428" Num="5" zHalfNm="280.357" Error="2.068">
-206.057 -72.563 20.989 -1.315 0.294
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.776" Depth="0.122"/>
<TopsideChapman PeakHeight="375.428" PeakDensity="1771743.1" PeakScaleHeight="69.52" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
