<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 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 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.03.29 (088) 18:10:00</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">
FF202608803291810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="13.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.706" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="37.207" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="9.300" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.000" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.110" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="14.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="111.097" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.998" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.173" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="340.349" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.231" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.438" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.550" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="121.967" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="66.885" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.154" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.830" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="8.800" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="100">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7 13.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
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</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 51 57 51 0 60 57 51 63 66 63 51 51 63 63 63 63 63 60 60 60 60 60 0 60 63 60 60 60 57 60 0 57 54 57 57 0 57 60 57 0 0 0 0 57 57 0 0 51 0 0 42 0 0 54 0 0 0 54 57 57 57 57 48 0 54 57 57 0 57 0 54 0 0 54 48 0 0 51 54 51 51 42 48 51 0 51 51 51 51 0 51 0 48 51 51 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.0 3.05 3.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
111.097 112.774 115.068
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="116">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.55 3.6 3.65 3.7 3.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 120.000 120.000 120.000 120.000 120.000 118.333 116.667 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 51 51 57 57 54 0 0 54 0 48 60 0 63 0 0 63 0 0 0 66 63 45 0 0 51 0 54 63 51 0 0 0 0 0 0 0 0 0 63 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 69 69 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 75 72 75 75 72 72 72 72 72 72 72 72 72 72 72 75 75 75 75 75 75 75 75 75 75 72 72 69 60 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.527 90.0 95.0 100.0 105.0 110.0 113.225 115.0 116.45 119.675 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 340.349 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.091 2.692 3.009 3.11 2.984 2.984 2.984 3.11 3.122 3.317 3.538 3.785 4.05 4.327 4.607 4.887 5.163 5.435 5.703 5.966 6.225 6.481 6.734 6.984 7.233 7.481 7.727 7.974 8.22 8.466 8.713 8.961 9.209 9.459 9.711 9.964 10.219 10.476 10.735 10.995 11.257 11.52 11.784 12.047 12.308 12.566 12.815 13.053 13.271 13.462 13.613 13.712 13.75 13.75 13.743 13.721 13.685 13.636 13.573 13.499 13.413 13.317 13.211 13.097 12.974 12.843 12.705 12.562 12.412 12.257 12.098 11.935 11.768 11.598 11.426 11.251 11.075 10.897 10.718 10.538 10.358 10.178 9.998 9.819 9.639 9.461 9.284 9.108 8.933 8.759 8.588 8.418 8.249 8.083 7.919 7.757 7.597 7.439 7.283 7.13 6.979 6.831 6.684 6.541 6.399 6.26 6.124 5.99 5.858 5.729 5.602 5.478 5.356 5.236 5.119 5.004 4.891 4.781 4.673 4.567 4.463 4.361 4.262 4.164 4.069 3.976 3.884 3.795 3.707 3.622 3.538 3.456 3.376 3.298 3.222 3.147 3.074 3.002 2.932 2.864 2.797 2.732 2.668 2.606 2.545 2.485 2.427 2.37 2.314 2.26 2.207 2.155 2.105 2.055 2.007 1.96 1.914 1.869 1.825 1.782 1.74 1.699 1.659 1.62 1.581 1.544 1.508 1.472 1.437 1.403 1.37 1.338 1.306 1.275 1.245 1.216 1.187 1.159 1.132 1.105 1.079 1.053 1.028 1.004 0.98 0.957

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.11" PeakHeight="110.0" Num="3" Error="0.0">
-30.286 12.835 -3.022
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.11" EndFrequency="13.75" PeakHeight="340.349" Num="5" zHalfNm="250.231" Error="3.301">
-194.569 -43.036 22.97 -5.513 -0.526
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.675" Depth="0.126"/>
<TopsideChapman PeakHeight="340.349" PeakDensity="2345688.5" PeakScaleHeight="65.154" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
