<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 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="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" >
2026.03.22 (081) 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">
FF202608103221810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.658" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.907" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.013" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.180" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="346.571" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="252.176" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.437" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.385" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.266" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.098" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 238.333 241.667 245.000 250.000 252.500 255.000 255.000 260.000 265.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 285.000 286.250 287.500 288.750 290.000 290.000 290.000 290.000 295.000 295.625 296.250 296.875 297.500 298.125 298.750 299.375 300.000 300.000 300.000 310.000 310.000 310.000 305.000 306.250 307.500 308.750 310.000 315.000 316.667 318.333 320.000 321.667 323.333 325.000 326.667 328.333 330.000 330.000 330.000 330.000 335.000 337.500 340.000 340.000 340.000 340.000 342.500 345.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 400.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 427.500 430.000 435.000 440.000 440.000 450.000 450.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.725 492.040 499.042 506.849 515.608 525.505 536.778 549.733 564.780 582.468
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 54 51 0 60 54 60 54 45 51 60 51 60 66 0 66 66 0 57 69 66 63 63 0 0 0 57 57 54 57 0 0 0 0 0 54 0 0 54 54 48 51 54 60 54 0 63 0 57 69 0 0 0 0 0 0 0 0 57 60 66 66 63 48 54 60 63 69 60 69 54 60 66 66 60 66 69 57 63 51 60 66 51 60 66 69 63 69 69 63 63 63 60 63 57 63 51 57 63 54 63 66 57 60 51 57 63 63 63 63 57 60 57 60 63 60 51 60 48 54 54 45 54 54 51 51 48 51 48 48 48 0 51 48 48 48 42 51 48 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -1.953125 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 -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 -0.390625 -1.171875 -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
</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" >
89.543 90.0 95.0 100.0 105.0 110.0 113.159 115.0 116.319 119.478 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.571 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.025 2.608 2.915 3.013 2.891 2.891 2.891 3.013 3.029 3.178 3.319 3.458 3.596 3.736 3.879 4.025 4.176 4.332 4.494 4.663 4.838 5.02 5.209 5.405 5.608 5.817 6.032 6.252 6.476 6.703 6.932 7.163 7.394 7.625 7.855 8.084 8.311 8.537 8.76 8.981 9.198 9.413 9.624 9.831 10.033 10.229 10.418 10.597 10.763 10.913 11.042 11.145 11.215 11.248 11.25 11.247 11.234 11.21 11.176 11.133 11.08 11.019 10.95 10.874 10.791 10.701 10.606 10.504 10.398 10.288 10.173 10.054 9.932 9.807 9.679 9.549 9.417 9.283 9.147 9.011 8.873 8.735 8.597 8.458 8.319 8.18 8.041 7.903 7.765 7.628 7.492 7.357 7.223 7.09 6.958 6.827 6.698 6.57 6.444 6.319 6.196 6.075 5.955 5.837 5.72 5.605 5.492 5.381 5.271 5.163 5.057 4.953 4.851 4.75 4.651 4.554 4.458 4.365 4.272 4.182 4.093 4.006 3.921 3.837 3.755 3.675 3.596 3.519 3.443 3.368 3.296 3.224 3.154 3.086 3.019 2.953 2.889 2.826 2.764 2.703 2.644 2.586 2.53 2.474 2.42 2.367 2.314 2.264 2.214 2.165 2.117 2.07 2.025 1.98 1.936 1.893 1.851 1.81 1.77 1.731 1.693 1.655 1.618 1.583 1.547 1.513 1.479 1.447 1.414 1.383 1.352 1.322 1.293 1.264 1.236 1.208 1.181 1.155 1.129 1.104 1.08 1.056 1.032 1.009 0.986 0.964

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.013" PeakHeight="110.0" Num="3" Error="0.0">
-30.206 12.718 -2.969
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.013" EndFrequency="11.25" PeakHeight="346.571" Num="5" zHalfNm="252.176" Error="4.173">
-192.933 -41.429 9.494 -4.597 2.372
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.478" Depth="0.122"/>
<TopsideChapman PeakHeight="346.571" PeakDensity="1570254.4" PeakScaleHeight="69.098" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
