<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 18:00:00.000"
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" >
2026.01.26 (026) 18:00:00</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">
FF202602601261800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.241" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.408" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="610.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.049" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.198" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="415.345" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.360" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.282" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="172.412" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.310" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.106" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="234.830" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="99">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 282.500 285.000 290.000 295.455 300.909 306.364 311.818 317.273 322.727 328.182 333.636 339.091 344.545 350.000 360.000 360.000 366.250 372.500 378.750 385.000 385.000 390.000 395.000 397.500 400.000 405.000 407.500 410.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 485.000 490.000 495.000 500.000 500.000 505.000 505.000 515.000 515.000 520.000 525.000 530.000 535.000 535.000 545.000 550.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 580.000 580.000 585.000 585.000 590.000 590.000 590.000 595.000 600.000 600.000 605.000 605.000 610.000 610.000 615.000 620.000 624.878 630.263 636.238 642.905 650.394 658.865 668.524 679.642 692.576
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 48 51 0 0 0 0 0 0 0 0 0 0 51 0 54 0 0 0 51 51 54 51 0 57 57 0 54 51 60 60 63 63 66 66 69 63 66 63 60 63 66 60 63 63 60 63 63 60 60 60 57 54 63 60 57 54 63 63 63 63 60 60 54 51 60 60 60 57 60 60 60 57 63 60 66 60 66 57 60 54 60 54 57 57 51 54 54 54 51 51 51 48 51 48 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 1.953125 -0.390625 0.390625 2.734375 1.953125 1.953125 -1.171875 -1.171875 -1.171875 -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 -1.171875 -0.390625 -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" >
89.537 90.0 95.0 100.0 105.0 110.0 113.002 115.0 116.003 119.005 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.345 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.05 2.639 2.95 3.049 2.927 2.927 2.927 3.049 3.073 3.194 3.315 3.435 3.557 3.681 3.807 3.935 4.065 4.198 4.332 4.467 4.604 4.741 4.878 5.015 5.151 5.286 5.42 5.552 5.683 5.812 5.939 6.065 6.189 6.312 6.433 6.552 6.67 6.787 6.903 7.017 7.131 7.244 7.355 7.467 7.577 7.687 7.797 7.906 8.015 8.124 8.233 8.343 8.452 8.562 8.672 8.782 8.894 9.006 9.119 9.232 9.347 9.462 9.576 9.69 9.798 9.895 9.969 10.0 10.0 9.998 9.99 9.977 9.959 9.937 9.91 9.878 9.842 9.802 9.759 9.711 9.661 9.606 9.549 9.489 9.426 9.361 9.292 9.222 9.15 9.075 8.999 8.921 8.841 8.76 8.677 8.593 8.508 8.423 8.336 8.248 8.16 8.071 7.982 7.892 7.802 7.712 7.621 7.53 7.44 7.349 7.258 7.168 7.077 6.987 6.898 6.808 6.719 6.631 6.542 6.455 6.368 6.281 6.195 6.11 6.025 5.941 5.857 5.775 5.693 5.611 5.531 5.451 5.372 5.294 5.217 5.14 5.065 4.99 4.916 4.843 4.77 4.699 4.628 4.558 4.489 4.421 4.354 4.287 4.222 4.157 4.093 4.03 3.968 3.906 3.846 3.786 3.727 3.669 3.612 3.555 3.499 3.444 3.39 3.337 3.284 3.232 3.181 3.131 3.081 3.032 2.984 2.936 2.89 2.843 2.798 2.753 2.709 2.666 2.623 2.581 2.54 2.499 2.458 2.419 2.38 2.342

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.049" PeakHeight="110.0" Num="3" Error="0.0">
-30.236 12.762 -2.989
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.049" EndFrequency="10.0" PeakHeight="415.345" Num="5" zHalfNm="277.36" Error="4.283">
-245.437 -81.173 42.87 -15.951 3.351
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.005" Depth="0.122"/>
<TopsideChapman PeakHeight="415.345" PeakDensity="1240694.8" PeakScaleHeight="94.106" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
