<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 12:00:00.000"
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="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 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" >
2026.01.27 (027) 12:00:00</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">
FF202602701271200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.479" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.924" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.650" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.060" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="105.310" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.385" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.149" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" 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="2.969" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.159" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="370.380" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.313" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.710" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="177.031" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.913" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="96.917" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="208.230" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.2 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 215.000 217.500 220.000 225.000 230.000 230.000 235.000 240.000 245.000 250.000 255.000 255.000 260.000 261.250 262.500 263.750 265.000 270.000 280.000 280.000 285.000 285.000 290.000 295.000 297.500 300.000 305.000 305.000 310.000 315.000 315.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 342.500 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 372.500 375.000 377.500 380.000 382.500 385.000 385.000 385.000 385.000 390.000 390.000 390.000 392.778 395.556 398.333 401.111 403.889 406.667 409.444 412.222 415.000 420.000 425.000 430.000 430.000 435.000 440.000 445.000 450.000 455.000 460.000 465.000 475.000 480.000 490.000 490.000 500.000 505.000 515.000 520.000 525.000 535.000 540.000 545.000 550.026 555.631 561.922 569.032 577.132 586.445 597.266 609.992 625.176 643.605 666.445 695.494
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 60 51 57 0 0 57 0 0 0 51 51 57 54 0 54 0 0 60 45 51 51 57 60 54 0 54 63 66 0 69 63 0 60 66 60 63 66 63 54 48 0 45 51 54 54 54 48 57 51 54 51 54 0 0 0 0 0 54 63 66 69 66 66 54 0 0 0 0 0 0 0 0 63 0 0 54 54 60 54 51 54 48 51 54 51 57 45 51 54 60 57 54 54 51 48 54 0 54 57 63 66 63 60 60 54 45 0 48
</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 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.310 105.993 106.747 107.592 108.552 109.667 111.004 112.684 114.981
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 54 0 54
</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 2.734375 -0.390625 -1.171875 -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 95.0 100.0 100.385 103.74 105.0 107.096 110.0 110.451 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.38 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.594 3.058 3.06 2.934 2.934 2.934 3.043 3.06 3.175 3.304 3.437 3.574 3.714 3.859 4.008 4.161 4.317 4.476 4.637 4.799 4.962 5.124 5.287 5.448 5.607 5.765 5.921 6.075 6.227 6.377 6.525 6.671 6.815 6.956 7.096 7.234 7.371 7.505 7.638 7.77 7.899 8.027 8.153 8.278 8.401 8.521 8.64 8.755 8.868 8.978 9.083 9.184 9.279 9.366 9.445 9.514 9.571 9.613 9.64 9.65 9.65 9.648 9.641 9.629 9.613 9.592 9.568 9.539 9.506 9.47 9.43 9.387 9.34 9.291 9.238 9.183 9.125 9.065 9.002 8.937 8.871 8.802 8.731 8.659 8.585 8.51 8.434 8.356 8.278 8.198 8.117 8.036 7.954 7.871 7.788 7.704 7.62 7.536 7.451 7.366 7.281 7.196 7.111 7.026 6.941 6.857 6.772 6.688 6.604 6.521 6.437 6.354 6.272 6.19 6.109 6.028 5.947 5.868 5.788 5.71 5.632 5.555 5.478 5.402 5.327 5.252 5.178 5.105 5.033 4.961 4.89 4.82 4.75 4.682 4.614 4.547 4.48 4.415 4.35 4.286 4.222 4.16 4.098 4.037 3.977 3.918 3.859 3.801 3.744 3.687 3.632 3.577 3.522 3.469 3.416 3.364 3.313 3.262 3.212 3.163 3.114 3.067 3.019 2.973 2.927 2.882 2.837 2.793 2.75 2.707 2.665 2.624 2.583 2.543 2.503 2.464 2.426 2.388 2.35 2.314 2.277 2.242 2.207 2.172 2.138 2.104 2.071

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.06" PeakHeight="100.385" Num="3" Error="2.93">
-15.348 6.483 -1.52
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.06" EndFrequency="9.65" PeakHeight="370.38" Num="5" zHalfNm="235.313" Error="6.137">
-239.041 -32.893 18.214 -7.767 1.558
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.066" Depth="0.126"/>
<TopsideChapman PeakHeight="370.38" PeakDensity="1155366.0" PeakScaleHeight="96.917" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
