<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 20:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.27 (086) 20:50:00</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">
FF202608603272050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.596" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.105" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.411" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="390.903" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.279" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.525" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="116.870" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.398" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.552" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.940" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="213">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 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 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
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</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 0 54 60 0 0 0 54 0 0 0 0 0 0 63 66 66 69 0 69 72 72 69 66 69 69 69 69 69 69 66 60 0 0 60 0 0 0 0 0 0 0 66 63 0 69 66 0 0 0 69 66 66 63 66 66 66 66 66 66 69 69 60 0 0 69 69 60 66 69 72 57 63 66 0 0 0 63 69 0 69 57 0 66 69 0 57 63 0 69 57 0 66 69 0 60 66 66 72 72 72 0 0 72 60 66 0 69 75 0 63 69 75 0 60 72 72 75 75 0 0 45 0 0 57 63 66 69 69 72 72 69 69 72 72 72 72 69 72 72 72 69 0 0 0 57 60 0 60 63 69 57 66 63 48 66 0 63 45 66 0 60 0 0 54 57 0 0 54 57 60 57 57 60 54 0 48 54 57 0 54 0 54 0 0 57 54 51 0 0 54 54 60 57 54 57 0 57 57 57 0 57 54 54 54 54 54 54 0 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.977 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.941 125.0 130.0 133.881 135.0 140.0 145.0 145.822 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 390.903 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.202 0.943 1.222 1.366 1.411 1.385 1.307 1.26 1.26 1.26 1.26 1.274 1.337 1.401 1.411 1.485 1.576 1.668 1.764 1.864 1.969 2.08 2.198 2.324 2.459 2.604 2.76 2.93 3.114 3.314 3.53 3.765 4.018 4.29 4.58 4.886 5.207 5.54 5.883 6.233 6.588 6.945 7.303 7.661 8.017 8.37 8.72 9.065 9.405 9.739 10.066 10.384 10.693 10.99 11.274 11.543 11.793 12.022 12.226 12.401 12.545 12.652 12.721 12.749 12.75 12.744 12.723 12.686 12.634 12.569 12.492 12.403 12.302 12.192 12.072 11.945 11.809 11.666 11.518 11.364 11.205 11.041 10.874 10.704 10.531 10.356 10.179 10.001 9.822 9.643 9.463 9.283 9.104 8.925 8.747 8.571 8.395 8.221 8.049 7.879 7.71 7.543 7.379 7.217 7.057 6.899 6.744 6.591 6.441 6.294 6.148 6.006 5.866 5.729 5.594 5.462 5.333 5.206 5.082 4.96 4.841 4.724 4.61 4.498 4.389 4.282 4.178 4.075 3.976 3.878 3.782 3.689 3.598 3.509 3.422 3.337 3.254 3.173 3.094 3.017 2.942 2.868 2.797 2.727 2.658 2.592 2.527 2.463 2.401 2.341 2.282 2.225 2.169 2.114 2.061 2.009 1.958 1.908 1.86 1.813 1.767 1.723 1.679 1.636 1.595 1.555 1.515 1.477 1.439 1.403 1.367 1.333 1.299 1.266 1.234 1.202 1.172 1.142 1.113 1.085 1.057 1.03 1.004 0.979 0.954 0.93 0.906

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.411" PeakHeight="110.0" Num="3" Error="0.0">
-27.905 9.614 -1.732
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.411" EndFrequency="12.75" PeakHeight="390.903" Num="5" zHalfNm="309.279" Error="5.376">
-217.131 -25.969 0.176 -4.825 2.668
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.822" Depth="0.151"/>
<TopsideChapman PeakHeight="390.903" PeakDensity="2016904.5" PeakScaleHeight="60.552" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
