<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 12:00:00.000"
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" >
2026.03.16 (075) 12:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607503161200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.816" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.679" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="6.400" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.019" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.183" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="316.074" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.885" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.179" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.850" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="106.667" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.725" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.809" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="142.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
305.000 305.000 305.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 322.500 325.000 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 335.000 337.500 340.000 342.500 345.000 345.000 345.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 380.000 382.500 385.000 385.000 385.000 385.000 387.500 390.000 390.000 392.500 395.000 397.500 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 412.500 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 433.279 436.933 441.030 445.656 450.921 456.966 463.979 472.213 482.017 493.886 508.552
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 60 60 57 54 48 0 66 63 0 54 66 66 63 66 66 0 60 63 0 0 60 0 0 60 0 69 0 63 48 57 63 0 69 69 66 69 57 60 63 69 66 63 66 57 63 66 69 66 63 63 69 60 66 51 66 63 45 54 57 0 66 54 60 63 48 57 0 48 54 0 60 54 57 57 54 45 51 51 54 54 51 54 51 51 0 48 45 48 45 48 48 48 48 0 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 -2.734375 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="52">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 130.000 130.000 130.000 130.000 130.000 125.000 125.000 125.000 125.000 123.333 121.667 120.000 125.000 125.000 125.000 125.000 122.500 120.000 120.000 120.000 125.000 127.500 130.000 130.000 126.667 123.333 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 54 54 57 57 57 0 0 45 60 57 0 63 0 60 0 60 63 0 51 45 0 0 66 66 0 60 63 66 66 0 0 0 0 0 69 69 69 0 0 0 0 72 72 72 72 72
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 1.171875 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 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
</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 95.0 100.0 105.0 110.0 113.133 115.0 116.267 119.4 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 316.074 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.03 2.613 2.921 3.019 2.897 2.897 2.897 3.019 3.047 3.284 3.521 3.755 3.984 4.208 4.427 4.641 4.852 5.06 5.266 5.471 5.675 5.878 6.081 6.284 6.488 6.693 6.9 7.107 7.317 7.529 7.743 7.96 8.179 8.402 8.627 8.856 9.088 9.322 9.559 9.797 10.035 10.271 10.501 10.719 10.917 11.081 11.197 11.248 11.25 11.245 11.225 11.191 11.144 11.084 11.012 10.929 10.836 10.734 10.624 10.506 10.381 10.249 10.112 9.97 9.824 9.674 9.521 9.365 9.207 9.047 8.886 8.723 8.56 8.397 8.234 8.071 7.908 7.747 7.586 7.426 7.268 7.112 6.957 6.803 6.652 6.503 6.355 6.21 6.067 5.927 5.789 5.653 5.519 5.388 5.259 5.133 5.009 4.888 4.769 4.652 4.538 4.427 4.317 4.21 4.106 4.004 3.903 3.806 3.71 3.617 3.526 3.436 3.349 3.264 3.182 3.101 3.021 2.944 2.869 2.796 2.724 2.654 2.586 2.519 2.454 2.391 2.33 2.269 2.211 2.154 2.098 2.044 1.991 1.939 1.889 1.84 1.792 1.745 1.7 1.656 1.613 1.571 1.53 1.49 1.451 1.413 1.376 1.341 1.306 1.272 1.238 1.206 1.175 1.144 1.114 1.085 1.057 1.029 1.002 0.976 0.95 0.925 0.901 0.878 0.855 0.832 0.811 0.789 0.769 0.749 0.729 0.71 0.691 0.673 0.656 0.638 0.622 0.605 0.59 0.574 0.559 0.544 0.53 0.516 0.503 0.49

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.019" PeakHeight="110.0" Num="3" Error="0.0">
-30.211 12.726 -2.972
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.019" EndFrequency="11.25" PeakHeight="316.074" Num="5" zHalfNm="234.885" Error="1.551">
-167.399 -46.166 19.341 -2.082 -0.368
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.4" Depth="0.122"/>
<TopsideChapman PeakHeight="316.074" PeakDensity="1570254.4" PeakScaleHeight="58.809" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
