<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 09:30:00.000"
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: 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) 09:30:00</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">
FF202608803290930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="7.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.235" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.556" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.100" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.725" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="286.211" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.665" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.210" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="88.947" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.377" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.961" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.900" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.650" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 252.500 250.000 247.500 245.000 245.000 250.000 247.500 245.000 245.000 245.000 250.000 250.000 250.000 255.000 255.000 252.500 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 257.500 260.000 260.000 261.250 262.500 263.750 265.000 262.500 260.000 260.000 262.000 264.000 266.000 268.000 270.000 270.000 265.000 265.000 267.500 270.000 270.000 270.000 270.000 273.333 276.667 280.000 280.000 280.000 282.500 285.000 285.000 285.000 285.000 285.000 287.500 290.000 290.000 290.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 330.000 330.000 335.000 345.000 345.000 350.000 360.000 370.000 385.000 420.000 476.833 624.914
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 0 0 60 63 60 0 63 0 57 63 57 60 0 0 0 51 0 60 0 0 57 54 48 51 0 60 63 69 66 66 0 63 66 66 66 63 63 72 0 72 72 0 0 0 0 0 69 66 60 0 0 0 0 69 75 57 0 0 0 75 69 0 0 72 75 78 0 63 66 0 69 69 0 63 69 72 69 75 78 72 75 75 72 60 63 63 48 60 60 69 69 66 66 63 54 66 66 69 66 66 57 54 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 110.000 110.000 110.000 110.000 110.000 115.000 120.000 130.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 60 0 54 0 54 0 54 51 63 51 60 51 51 51 48 0 0 0 51
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="178">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.846 90.0 95.0 100.0 105.0 110.0 115.0 119.801 120.0 125.0 129.602 130.0 135.0 139.403 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 286.211 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.213 1.154 1.494 1.669 1.725 1.69 1.586 1.586 1.586 1.586 1.592 1.663 1.725 1.746 1.904 2.048 2.187 2.325 2.466 2.612 2.764 2.925 3.099 3.287 3.495 3.728 3.994 4.305 4.676 5.119 5.62 6.115 6.537 6.87 7.131 7.337 7.499 7.626 7.726 7.8 7.853 7.886 7.899 7.9 7.896 7.877 7.845 7.8 7.743 7.675 7.598 7.512 7.418 7.316 7.209 7.096 6.978 6.856 6.731 6.602 6.472 6.34 6.206 6.072 5.937 5.802 5.667 5.533 5.399 5.267 5.136 5.006 4.878 4.752 4.627 4.504 4.384 4.266 4.149 4.036 3.924 3.815 3.708 3.603 3.501 3.401 3.304 3.209 3.116 3.026 2.938 2.852 2.769 2.687 2.608 2.531 2.456 2.383 2.312 2.243 2.176 2.111 2.047 1.986 1.926 1.868 1.812 1.757 1.704 1.652 1.602 1.554 1.506 1.461 1.416 1.373 1.331 1.291 1.251 1.213 1.176 1.14 1.105 1.072 1.039 1.007 0.976 0.946 0.917 0.889 0.862 0.835 0.81 0.785 0.761 0.738 0.715 0.693 0.672 0.651 0.631 0.612 0.593 0.575 0.557 0.54 0.523 0.507 0.492 0.476 0.462 0.448 0.434 0.421 0.408 0.395 0.383 0.371 0.36 0.349 0.338 0.328 0.317 0.308 0.298 0.289 0.28 0.271 0.263 0.255 0.247 0.24 0.232 0.225 0.218 0.211 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.725" PeakHeight="110.0" Num="3" Error="0.0">
-28.599 10.494 -2.049
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.725" EndFrequency="7.9" PeakHeight="286.211" Num="5" zHalfNm="224.665" Error="4.805">
-142.639 7.504 -20.285 9.215 -0.603
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="29.403" Depth="0.139"/>
<TopsideChapman PeakHeight="286.211" PeakDensity="774317.6" PeakScaleHeight="49.961" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
