<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-28 -028 13:40:00.000"
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 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" >
2026.01.28 (028) 13:40:00</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">
FF202602801281340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.447" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.061" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" 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="3.283" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.310" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="376.392" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="258.834" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.855" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.390" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.502" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="85.858" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="194.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="104">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 320.000 324.167 328.333 332.500 336.667 340.833 345.000 350.000 350.000 352.000 354.000 356.000 358.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 392.500 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 417.500 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 455.000 460.000 460.000 470.000 475.000 475.000 480.000 480.000 490.000 490.000 495.000 500.000 505.000 505.000 510.000 510.000 520.000 525.000 525.000 530.000 540.000 545.000 550.000 555.895 562.407 569.639 577.716 586.797 597.081 608.824 622.359 638.132 656.746
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 0 0 0 0 54 48 51 0 0 51 0 48 0 57 60 60 57 54 57 60 60 54 51 51 54 57 57 57 54 60 63 60 54 54 54 51 0 51 57 57 60 57 0 57 57 54 54 54 54 57 48 57 60 57 60 0 60 57 60 57 60 60 54 60 57 54 48 57 57 63 60 57 54 60 60 57 54 57 57 54 54 54 57 57 54 51 57 54 51 51 51 51 48 48 45 45 45 42 42 45 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 0.390625 1.171875 -0.390625 -1.171875 -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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875 1.171875
</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" >
89.5 90.0 95.0 100.0 105.0 110.0 111.993 113.986 115.0 115.979 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.392 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.208 2.841 3.176 3.283 3.161 3.161 3.223 3.283 3.432 3.593 3.741 3.881 4.018 4.152 4.286 4.42 4.554 4.689 4.825 4.963 5.103 5.244 5.388 5.533 5.68 5.83 5.981 6.134 6.288 6.445 6.602 6.761 6.921 7.082 7.244 7.406 7.569 7.732 7.895 8.059 8.222 8.385 8.548 8.71 8.871 9.031 9.19 9.346 9.501 9.652 9.799 9.941 10.077 10.205 10.322 10.426 10.514 10.583 10.628 10.649 10.65 10.648 10.64 10.625 10.603 10.576 10.543 10.504 10.46 10.411 10.357 10.298 10.236 10.169 10.099 10.025 9.947 9.867 9.784 9.698 9.609 9.519 9.426 9.331 9.235 9.137 9.038 8.937 8.835 8.733 8.629 8.525 8.421 8.315 8.21 8.104 7.998 7.892 7.787 7.681 7.575 7.47 7.365 7.261 7.157 7.053 6.95 6.848 6.747 6.646 6.546 6.447 6.348 6.251 6.154 6.059 5.964 5.87 5.777 5.686 5.595 5.505 5.416 5.329 5.242 5.157 5.072 4.989 4.907 4.826 4.745 4.667 4.589 4.512 4.436 4.361 4.288 4.215 4.144 4.073 4.004 3.936 3.868 3.802 3.737 3.672 3.609 3.547 3.486 3.425 3.366 3.307 3.25 3.193 3.138 3.083 3.029 2.976 2.924 2.873 2.822 2.773 2.724 2.676 2.629 2.582 2.537 2.492 2.448 2.405 2.362 2.32 2.279 2.239 2.199 2.16 2.122 2.084 2.047 2.01 1.975 1.939 1.905 1.871 1.838 1.805

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.283" PeakHeight="110.0" Num="3" Error="0.0">
-30.422 13.035 -3.113
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.283" EndFrequency="10.65" PeakHeight="376.392" Num="5" zHalfNm="258.834" Error="5.863">
-224.505 -50.934 15.755 -2.513 1.784
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.979" Depth="0.122"/>
<TopsideChapman PeakHeight="376.392" PeakDensity="1407227.0" PeakScaleHeight="85.858" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
