<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 13:10:00.000"
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 1 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.20 (079) 13:10:00</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">
FF202607903201310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="9.625" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.372" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.753" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.433" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.265" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.302" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="317.145" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="193.672" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.183" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.348" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.774" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="64.763" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.181" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.287" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="142.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.230" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.270" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="85">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.789 316.579 317.368 318.158 318.947 319.737 320.526 321.316 322.105 322.895 323.684 324.474 325.263 326.053 326.842 327.632 328.421 329.211 330.000 330.000 331.667 333.333 335.000 335.000 340.000 340.000 340.000 340.000 342.500 345.000 347.083 349.167 351.250 353.333 355.417 357.500 359.583 361.667 363.750 365.833 367.917 370.000 370.000 375.000 375.000 377.500 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 460.000 465.000 465.000 470.000 477.037 485.456 495.708 508.464
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 0 0 0 0 0 0 0 0 48 0 48 0 48 0 0 51 0 51 51 0 0 57 54 60 63 60 66 0 63 0 0 0 0 0 0 0 0 0 63 0 63 66 51 51 0 54 63 54 63 57 60 48 57 57 60 63 63 63 63 63 60 63 60 63 63 54 60 60 63 66 63 66 69 66 66 63 66 63 63 51 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 1.953125 -2.734375 -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 2.734375 -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 -0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 235.000 245.000 250.000 260.000 265.000 270.556 276.111 281.667 287.222 292.778 298.333 303.889 309.444 315.000 310.000 312.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 54 51 51 51 0 0 0 0 0 0 0 0 45 51 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 -2.734375 1.171875 -1.171875 -2.734375 -1.953125 -1.953125 1.953125 0.390625 -0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.503 90.0 95.0 100.0 105.0 110.0 112.067 114.133 115.0 116.2 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 193.672 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 317.145 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.196 2.826 3.159 3.265 3.143 3.143 3.194 3.265 3.417 3.587 3.754 3.921 4.087 4.245 4.391 4.526 4.65 4.767 4.877 4.983 5.088 5.194 5.307 5.372 5.415 5.578 5.744 5.917 6.096 6.282 6.476 6.676 6.88 7.086 7.292 7.494 7.691 7.884 8.07 8.251 8.427 8.598 8.765 8.929 9.089 9.246 9.395 9.528 9.615 9.625 9.623 9.61 9.585 9.55 9.505 9.45 9.386 9.314 9.234 9.147 9.054 8.955 8.851 8.742 8.628 8.511 8.39 8.267 8.141 8.013 7.883 7.752 7.62 7.487 7.353 7.219 7.085 6.951 6.817 6.684 6.552 6.421 6.29 6.161 6.033 5.906 5.781 5.657 5.535 5.414 5.295 5.178 5.063 4.95 4.838 4.728 4.621 4.515 4.411 4.309 4.209 4.11 4.014 3.92 3.827 3.737 3.648 3.561 3.476 3.393 3.311 3.232 3.154 3.077 3.003 2.93 2.859 2.789 2.721 2.655 2.59 2.526 2.464 2.404 2.344 2.287 2.23 2.175 2.121 2.069 2.018 1.968 1.919 1.871 1.825 1.78 1.735 1.692 1.65 1.609 1.569 1.53 1.492 1.454 1.418 1.383 1.348 1.314 1.282 1.249 1.218 1.188 1.158 1.129 1.101 1.073 1.046 1.02 0.994 0.969 0.945 0.921 0.898 0.876 0.854 0.832 0.811 0.791 0.771 0.752 0.733 0.715 0.697 0.679 0.662 0.645 0.629 0.613 0.598 0.583 0.568 0.554 0.54 0.526 0.513 0.5 0.488

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.265" PeakHeight="110.0" Num="3" Error="0.0">
-30.408 13.015 -3.104
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.265" EndFrequency="5.372" PeakHeight="193.672" Num="5" Error="0.0">
-60.7 -25.507 12.089 -4.726 1.372
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.372" EndFrequency="9.625" PeakHeight="317.145" Num="5" zHalfNm="233.183" Error="2.545">
-97.153 -32.383 9.363 -4.301 1.001
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.2" Depth="0.122"/>
<TopsideChapman PeakHeight="317.145" PeakDensity="1149387.4" PeakScaleHeight="61.287" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
