<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 18:40:00.000"
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 1 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 18:40:00</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">
FF202602601261840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.175" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.872" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.243" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.768" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="415.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="605.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.867" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="425.058" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="246.420" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.796" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.317" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.917" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="99.296" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.020" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="91.919" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="213.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.210" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="86">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
415.000 415.000 415.000 417.500 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 437.000 439.000 441.000 443.000 445.000 445.000 447.500 450.000 452.500 455.000 457.500 460.000 460.000 462.500 465.000 470.000 472.500 475.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 495.000 495.000 495.000 500.000 505.000 510.000 510.000 515.000 520.000 525.000 530.000 530.000 535.000 535.000 540.000 545.000 550.000 555.000 557.500 560.000 560.000 565.000 570.000 575.000 575.000 580.000 585.000 590.000 590.000 592.500 595.000 600.000 605.000 605.000 605.000 615.000 625.000 630.000 630.000 635.000 640.000 650.000 658.753 668.738 680.236 693.617 709.387
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 60 0 57 54 54 0 60 54 57 60 57 57 0 0 0 0 60 63 0 0 0 0 0 51 60 48 57 48 0 48 57 60 57 63 60 54 63 60 63 63 60 63 63 60 63 63 63 60 63 63 60 60 60 57 54 48 60 60 60 57 51 60 54 57 48 54 0 57 57 51 57 57 51 48 54 60 0 54 54 54 51 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 1.953125 -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 1.171875 0.390625 0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 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 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 375.000 380.000 385.000 390.000 400.000 402.500 405.000 405.000 410.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 0 51 51 0 51 57 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.569 90.0 95.0 100.0 105.0 110.0 113.824 115.0 117.647 120.0 121.471 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 246.42 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 425.058 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.927 2.482 2.774 2.867 2.745 2.745 2.745 2.82 2.867 2.984 3.138 3.291 3.449 3.614 3.783 3.95 4.111 4.261 4.401 4.532 4.653 4.767 4.875 4.978 5.077 5.173 5.267 5.359 5.45 5.54 5.63 5.721 5.807 5.868 5.872 5.971 6.103 6.229 6.354 6.478 6.603 6.729 6.857 6.987 7.12 7.254 7.391 7.528 7.666 7.805 7.943 8.079 8.215 8.348 8.479 8.607 8.733 8.857 8.978 9.097 9.214 9.33 9.443 9.555 9.666 9.775 9.881 9.983 10.075 10.146 10.175 10.175 10.172 10.164 10.15 10.13 10.106 10.077 10.043 10.005 9.962 9.916 9.865 9.811 9.754 9.693 9.629 9.562 9.493 9.421 9.346 9.27 9.191 9.11 9.028 8.944 8.858 8.771 8.683 8.594 8.504 8.413 8.321 8.229 8.136 8.042 7.949 7.854 7.76 7.666 7.571 7.477 7.382 7.288 7.194 7.1 7.007 6.914 6.821 6.729 6.637 6.546 6.455 6.365 6.276 6.187 6.099 6.012 5.925 5.839 5.754 5.67 5.586 5.504 5.422 5.341 5.261 5.182 5.104 5.026 4.95 4.874 4.799 4.725 4.653 4.581 4.509 4.439 4.37 4.301 4.234 4.167 4.102 4.037 3.973 3.91 3.848 3.786 3.726 3.666 3.607 3.549 3.492 3.436 3.381 3.326 3.272 3.219 3.167 3.115 3.065 3.015 2.966 2.917 2.87 2.823 2.776 2.731 2.686 2.642 2.599 2.556 2.514 2.472 2.432 2.391 2.352

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.867" PeakHeight="110.0" Num="3" Error="0.0">
-30.081 12.535 -2.885
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="2.867" EndFrequency="5.872" PeakHeight="246.42" Num="5" Error="0.0">
-106.038 -31.343 18.837 -8.723 2.318
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.872" EndFrequency="10.175" PeakHeight="425.058" Num="5" zHalfNm="297.796" Error="4.329">
-139.978 -49.328 14.39 -5.673 1.951
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.471" Depth="0.122"/>
<TopsideChapman PeakHeight="425.058" PeakDensity="1284499.1" PeakScaleHeight="91.919" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
