<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 18:20:00.000"
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="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" >
2026.01.26 (026) 18:20:00</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">
FF202602601261820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.208" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.522" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="205.000" 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="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="620.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.964" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.156" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="434.391" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.827" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.318" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="173.062" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.631" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="95.893" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="241.960" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 210.000 217.500 225.000 230.000 235.000 240.000 240.000 244.000 248.000 252.000 256.000 260.000 265.000 276.250 287.500 298.750 310.000 315.000 320.000 324.231 328.462 332.692 336.923 341.154 345.385 349.615 353.846 358.077 362.308 366.538 370.769 375.000 380.000 385.000 392.500 400.000 405.000 410.000 415.000 420.000 430.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 470.000 470.000 475.000 480.000 480.000 480.000 485.000 490.000 490.000 495.000 495.000 495.000 500.000 505.000 510.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 530.000 530.000 540.000 545.000 545.000 550.000 555.000 560.000 560.000 560.000 565.000 565.000 565.000 570.000 570.000 575.000 575.000 580.000 580.000 590.000 585.000 587.500 590.000 590.000 595.000 600.000 600.000 605.000 610.000 615.000 620.000 620.000 625.000 630.000 635.000 640.389 646.442 653.288 661.096 670.082 680.536 692.849 707.565 725.464
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 0 51 48 0 51 45 0 0 0 0 48 51 0 0 0 45 48 48 0 0 0 0 45 0 0 0 0 0 0 0 57 54 57 0 54 57 0 54 51 60 57 66 51 60 57 57 60 57 57 63 57 63 63 54 60 63 63 60 63 60 60 60 60 54 60 63 57 63 54 57 60 54 63 60 63 63 60 54 63 60 54 45 54 57 54 60 57 57 57 57 57 57 54 51 60 48 63 57 54 54 57 57 51 54 45 54 54 54 51 54 54 51 54 51 48 48 45 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 1.953125 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -2.734375 2.734375 1.171875 2.734375 -0.390625 -1.953125 -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 -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 1.953125
</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" >
89.552 90.0 95.0 100.0 105.0 110.0 113.379 115.0 116.759 120.0 120.138 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 434.391 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.992 2.566 2.868 2.964 2.842 2.842 2.842 2.959 2.964 3.047 3.144 3.254 3.379 3.517 3.666 3.821 3.977 4.131 4.281 4.425 4.565 4.7 4.83 4.957 5.08 5.2 5.318 5.433 5.546 5.658 5.768 5.878 5.986 6.093 6.2 6.306 6.412 6.517 6.623 6.728 6.834 6.939 7.046 7.152 7.259 7.367 7.475 7.584 7.694 7.805 7.917 8.03 8.144 8.26 8.377 8.495 8.615 8.736 8.859 8.983 9.109 9.235 9.363 9.49 9.616 9.74 9.858 9.968 10.063 10.139 10.186 10.2 10.2 10.197 10.188 10.175 10.156 10.133 10.105 10.073 10.037 9.997 9.954 9.906 9.856 9.802 9.745 9.685 9.622 9.556 9.489 9.419 9.346 9.272 9.196 9.118 9.039 8.958 8.876 8.792 8.708 8.622 8.535 8.448 8.36 8.271 8.182 8.092 8.002 7.912 7.821 7.731 7.64 7.549 7.458 7.368 7.277 7.187 7.097 7.007 6.918 6.829 6.74 6.652 6.564 6.477 6.391 6.305 6.219 6.134 6.05 5.967 5.884 5.802 5.721 5.64 5.561 5.482 5.403 5.326 5.249 5.173 5.098 5.024 4.951 4.878 4.807 4.736 4.666 4.596 4.528 4.46 4.394 4.328 4.263 4.198 4.135 4.072 4.01 3.949 3.889 3.83 3.771 3.713 3.656 3.6 3.545 3.49 3.436 3.383 3.331 3.279 3.228 3.178 3.128 3.079 3.031 2.984 2.937 2.891 2.846 2.801 2.757 2.714 2.671 2.629

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.964" PeakHeight="110.0" Num="3" Error="0.0">
-30.165 12.658 -2.941
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.964" EndFrequency="10.2" PeakHeight="434.391" Num="5" zHalfNm="297.827" Error="8.588">
-261.713 -83.176 41.579 -8.036 -2.907
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.138" Depth="0.122"/>
<TopsideChapman PeakHeight="434.391" PeakDensity="1290818.9" PeakScaleHeight="95.893" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
