<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 16:20:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 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" >
2026.01.29 (029) 16:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602901291620009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.286" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.550" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.310" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.563" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.645" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.457" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="565.000" 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="3.318" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.327" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="410.910" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.127" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.721" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="183.426" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.914" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="103.225" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="239.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="96">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 327.500 335.000 340.000 345.000 347.500 350.000 355.000 360.000 365.000 367.500 370.000 375.000 380.000 385.000 390.000 390.000 390.000 394.000 398.000 402.000 406.000 410.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 442.000 444.000 446.000 448.000 450.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 500.000 505.000 510.000 515.000 515.000 525.000 525.000 530.000 535.000 540.000 545.000 545.000 550.000 550.000 555.000 555.000 560.000 565.000 565.000 575.000 580.000 585.000 590.000 595.727 601.972 608.808 616.323 624.625 633.842 644.136 655.707 668.808 683.764 700.999 721.077 744.765
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 54 51 45 0 48 48 54 54 0 0 51 57 51 51 60 57 0 54 0 0 57 63 57 0 0 57 60 57 57 51 51 51 60 45 0 0 54 0 51 57 57 60 54 60 57 66 60 63 60 63 63 60 63 60 60 63 63 63 63 66 69 66 60 63 60 57 57 54 60 57 57 60 60 60 54 0 54 60 60 60 57 54 51 42 45 0 48 51 51 48 45 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 1.953125 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.563 101.489 102.502 103.622 104.875 106.299 107.953 109.936
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 51 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -1.953125 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" >
90.0 95.0 97.645 99.492 100.0 101.339 103.186 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.91 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.091 3.31 3.188 3.188 3.188 3.31 3.363 3.5 3.63 3.754 3.875 3.994 4.111 4.228 4.344 4.459 4.575 4.69 4.806 4.922 5.038 5.155 5.272 5.389 5.507 5.626 5.745 5.864 5.984 6.105 6.225 6.347 6.468 6.59 6.713 6.835 6.959 7.082 7.206 7.33 7.454 7.578 7.703 7.828 7.953 8.078 8.204 8.329 8.454 8.579 8.704 8.828 8.952 9.075 9.197 9.318 9.436 9.553 9.665 9.774 9.878 9.974 10.062 10.14 10.205 10.254 10.286 10.3 10.3 10.298 10.292 10.282 10.267 10.248 10.225 10.198 10.167 10.133 10.096 10.055 10.011 9.964 9.914 9.861 9.806 9.748 9.688 9.626 9.562 9.495 9.427 9.357 9.286 9.213 9.139 9.063 8.986 8.908 8.829 8.749 8.668 8.587 8.505 8.422 8.339 8.255 8.171 8.086 8.002 7.917 7.832 7.746 7.661 7.576 7.491 7.406 7.321 7.236 7.152 7.068 6.984 6.901 6.817 6.735 6.652 6.57 6.489 6.408 6.328 6.248 6.169 6.09 6.012 5.934 5.857 5.781 5.705 5.631 5.556 5.483 5.41 5.337 5.266 5.195 5.125 5.056 4.987 4.919 4.852 4.785 4.719 4.654 4.59 4.526 4.463 4.401 4.34 4.279 4.219 4.16 4.101 4.043 3.986 3.93 3.874 3.819 3.764 3.711 3.658 3.605 3.554 3.503 3.452 3.403 3.354 3.305 3.258 3.211 3.164 3.118 3.073 3.028 2.984 2.941 2.898 2.856 2.814

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.31" PeakHeight="97.645" Num="3" Error="1.586">
-11.35 4.871 -1.166
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.31" EndFrequency="10.3" PeakHeight="410.91" Num="5" zHalfNm="268.127" Error="3.634">
-264.056 -64.013 22.773 -3.628 1.2
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.541" Depth="0.122"/>
<TopsideChapman PeakHeight="410.91" PeakDensity="1316253.1" PeakScaleHeight="103.225" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
