<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 16:50:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.03.11 (070) 16:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202607003111650009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.400" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.359" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.350" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" 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="8.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.294" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.316" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="371.952" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.834" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.030" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="172.179" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.766" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.197" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="212.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.410" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="7.650" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="51">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 395.000 395.000 395.000 399.375 403.750 408.125 412.500 416.875 421.250 425.625 430.000 434.375 438.750 443.125 447.500 451.875 456.250 460.625 465.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 565.000 570.000 580.000 585.000 590.000 599.565 610.191 622.065 635.421 650.554 667.845
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 48 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 63 63 63 63 63 66 66 66 63 60 54 63 60 57 60 57 57 57 57 54 51 48 45 51 51 48 48 48 45 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 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 -1.171875 -0.390625 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="83">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 120.000 115.000 120.000 120.000 120.000 120.000 120.000 115.000 115.000 115.000 110.000 115.000 116.667 118.333 120.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 112.500 110.000 110.000 110.000 105.000 106.667 108.333 110.000 110.000 111.250 112.500 113.750 115.000 115.000 115.000 115.000 115.000 114.500 114.000 113.500 113.000 112.500 112.000 111.500 111.000 110.500 110.000 110.000 110.000 110.000 112.500 115.000 115.000 110.000 105.000 110.000 110.000 110.000 105.000 105.000 106.250 107.500 108.750 110.000 110.000 110.000 110.000 110.000 110.000 110.000 108.333 106.667 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 51 45 0 0 0 48 54 0 57 51 0 0 0 45 57 60 0 60 57 60 0 63 66 0 0 66 57 0 72 72 69 0 0 0 72 69 0 0 0 60 63 0 60 0 0 0 0 0 54 0 63 0 0 78 75 72 69 0 0 0 0 72 75 0 78 78 63 0 0 0 78 81 81 81 81 78 75 0 0 57 72
</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 -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
</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" >
89.498 90.0 95.0 100.0 105.0 110.0 111.948 113.895 115.0 115.843 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.952 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.216 2.851 3.187 3.294 3.172 3.172 3.241 3.294 3.417 3.565 3.714 3.866 4.021 4.18 4.342 4.508 4.677 4.847 5.019 5.191 5.362 5.533 5.701 5.867 6.03 6.191 6.349 6.504 6.656 6.805 6.952 7.096 7.238 7.378 7.516 7.652 7.787 7.919 8.05 8.18 8.309 8.436 8.562 8.687 8.811 8.933 9.055 9.175 9.293 9.409 9.523 9.634 9.74 9.841 9.933 10.013 10.079 10.125 10.148 10.15 10.149 10.143 10.132 10.115 10.094 10.068 10.037 10.002 9.963 9.92 9.873 9.823 9.769 9.712 9.652 9.589 9.524 9.456 9.385 9.312 9.237 9.16 9.082 9.001 8.92 8.836 8.752 8.666 8.579 8.492 8.403 8.314 8.224 8.134 8.043 7.952 7.86 7.768 7.676 7.584 7.492 7.4 7.309 7.217 7.126 7.034 6.944 6.853 6.763 6.673 6.584 6.496 6.408 6.32 6.234 6.147 6.062 5.977 5.893 5.809 5.727 5.645 5.564 5.483 5.404 5.325 5.247 5.17 5.094 5.019 4.944 4.87 4.798 4.726 4.654 4.584 4.515 4.446 4.378 4.312 4.246 4.18 4.116 4.053 3.99 3.928 3.867 3.807 3.748 3.689 3.632 3.575 3.519 3.464 3.409 3.355 3.302 3.25 3.199 3.148 3.098 3.049 3.001 2.953 2.906 2.859 2.814 2.769 2.724 2.681 2.638 2.596 2.554 2.513 2.472 2.433 2.394 2.355 2.317 2.28 2.243 2.207 2.171 2.136 2.101 2.067

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.294" PeakHeight="110.0" Num="3" Error="0.0">
-30.43 13.047 -3.119
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.294" EndFrequency="10.15" PeakHeight="371.952" Num="5" zHalfNm="237.834" Error="3.488">
-230.27 -43.469 25.917 -10.608 2.321
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.843" Depth="0.122"/>
<TopsideChapman PeakHeight="371.952" PeakDensity="1278194.8" PeakScaleHeight="94.197" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
