<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 13:10:00.000"
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 1 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.30 (089) 13:10:00</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">
FF202608903301310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="12.275" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.473" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.493" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.536" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.267" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.303" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="364.110" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="183.557" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.411" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.349" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="135.284" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="58.920" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="64.473" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.569" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="173.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.020" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 295.000 295.000 295.000 292.500 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 287.500 290.000 290.000 295.000 297.500 300.000 300.000 300.000 300.000 300.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 447.000 449.000 451.000 453.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 477.500 480.000 485.000 490.000 490.000 490.000 500.000 500.000 505.000 505.000 510.000 515.000 518.333 521.667 525.000 530.000 535.000 535.000 540.000 550.000 555.000 560.000 570.000 580.000 590.000 607.500 628.853
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 57 57 0 48 54 57 54 54 0 63 63 63 60 60 63 60 60 60 60 60 57 57 54 0 66 63 63 0 51 0 60 63 63 54 57 0 48 54 0 63 57 54 48 57 60 57 60 60 63 60 54 60 54 60 57 57 51 57 57 48 57 54 63 60 63 60 57 63 60 60 60 60 48 57 60 60 60 57 57 57 51 57 60 60 60 60 54 60 51 0 57 51 0 0 51 0 51 54 0 42 48 42 51 45 48 48 0 48 51 48 51 42 42 51 48 48 51 48 0 0 51 51 51 48 42 51 48 45 0 0 42 0 42
</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 -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 -0.390625 1.953125 -1.953125 1.171875 -0.390625 -0.390625 1.171875 2.734375 -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 1.953125 0.390625 1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="12">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 250.000 255.000 260.000 265.000 270.000 275.000 280.000 285.000 290.000 292.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 45 0 48 0 48 0 0 48 45 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 2.734375 0.390625 -1.171875 -1.171875 0.390625 -0.390625 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.502 90.0 95.0 100.0 105.0 110.0 112.062 114.123 115.0 116.185 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.557 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.11 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.197 2.827 3.161 3.267 3.145 3.145 3.197 3.267 3.448 3.677 3.9 4.11 4.302 4.475 4.633 4.78 4.918 5.05 5.18 5.307 5.428 5.473 5.529 5.746 5.995 6.27 6.558 6.843 7.118 7.379 7.626 7.86 8.084 8.298 8.504 8.703 8.897 9.086 9.271 9.453 9.632 9.808 9.983 10.156 10.329 10.5 10.67 10.84 11.008 11.176 11.342 11.506 11.667 11.821 11.965 12.092 12.194 12.258 12.275 12.275 12.269 12.253 12.229 12.197 12.157 12.109 12.055 11.993 11.925 11.851 11.772 11.687 11.598 11.503 11.405 11.302 11.196 11.087 10.974 10.859 10.741 10.621 10.498 10.374 10.249 10.122 9.993 9.864 9.734 9.603 9.472 9.341 9.209 9.077 8.946 8.814 8.683 8.553 8.422 8.293 8.164 8.036 7.909 7.782 7.657 7.533 7.409 7.287 7.166 7.047 6.928 6.811 6.695 6.581 6.467 6.356 6.245 6.136 6.029 5.923 5.818 5.715 5.613 5.513 5.414 5.317 5.221 5.126 5.033 4.942 4.852 4.763 4.675 4.59 4.505 4.422 4.34 4.26 4.181 4.103 4.026 3.951 3.877 3.805 3.733 3.663 3.594 3.527 3.46 3.395 3.331 3.268 3.206 3.145 3.085 3.027 2.969 2.913 2.857 2.803 2.749 2.697 2.645 2.595 2.545 2.496 2.449 2.402 2.356 2.31 2.266 2.222 2.18 2.138 2.097 2.056 2.017 1.978 1.94 1.902 1.866 1.83 1.795 1.76 1.726 1.693 1.66

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.267" PeakHeight="110.0" Num="3" Error="0.0">
-30.41 13.017 -3.105
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.267" EndFrequency="5.473" PeakHeight="183.557" Num="5" Error="0.0">
-55.925 -17.977 9.077 -3.158 0.611
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.473" EndFrequency="12.275" PeakHeight="364.11" Num="5" zHalfNm="249.411" Error="4.628">
-158.53 -36.051 19.856 -5.318 -0.51
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.185" Depth="0.122"/>
<TopsideChapman PeakHeight="364.11" PeakDensity="1869424.6" PeakScaleHeight="79.569" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
