<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 13:00:00.000"
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 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" >
2026.01.31 (031) 13:00:00</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">
FF202603101311300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.407" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.144" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="7.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.191" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.267" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="391.147" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.488" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.721" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="199.132" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.768" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="109.097" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="232.320" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="70">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 330.000 333.333 336.667 340.000 345.000 345.000 345.000 350.000 355.000 355.000 360.000 360.000 363.333 366.667 370.000 373.333 376.667 380.000 380.000 385.000 387.500 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 425.000 430.000 435.000 435.000 440.000 445.000 450.000 460.000 465.000 470.000 475.000 480.000 490.000 500.000 505.000 515.000 525.000 535.000 540.000 550.000 560.000 565.000 575.000 580.000 590.000 600.000 605.000 610.000 615.000 625.000 635.000 645.000 658.079 674.030 693.917 719.401 753.232
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 54 54 45 57 0 57 57 54 48 0 0 45 0 0 51 54 51 0 54 45 51 45 57 54 54 57 60 57 54 45 48 48 48 60 60 60 60 54 51 63 60 57 57 60 66 57 57 57 60 57 51 57 57 0 60 60 60 60 54 57 54 57 48 0 54 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 2.734375 -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 -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
</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" >
89.514 90.0 95.0 100.0 105.0 110.0 112.383 114.767 115.0 117.15 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 391.147 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.146 2.762 3.087 3.191 3.069 3.069 3.081 3.191 3.281 3.419 3.545 3.667 3.787 3.907 4.029 4.153 4.28 4.411 4.545 4.683 4.824 4.968 5.115 5.263 5.412 5.561 5.708 5.854 5.998 6.139 6.278 6.413 6.545 6.674 6.8 6.924 7.044 7.162 7.277 7.39 7.501 7.609 7.715 7.819 7.922 8.022 8.121 8.217 8.312 8.404 8.494 8.582 8.667 8.749 8.827 8.901 8.97 9.032 9.086 9.132 9.167 9.19 9.2 9.2 9.199 9.194 9.186 9.174 9.159 9.141 9.119 9.095 9.067 9.037 9.004 8.969 8.931 8.89 8.848 8.803 8.756 8.707 8.657 8.604 8.55 8.494 8.437 8.379 8.319 8.258 8.195 8.132 8.067 8.002 7.936 7.869 7.801 7.733 7.664 7.595 7.525 7.454 7.383 7.312 7.241 7.169 7.098 7.026 6.954 6.882 6.81 6.738 6.666 6.594 6.523 6.451 6.38 6.309 6.238 6.167 6.097 6.027 5.957 5.888 5.819 5.751 5.682 5.615 5.548 5.481 5.414 5.349 5.283 5.218 5.154 5.09 5.027 4.964 4.902 4.84 4.779 4.718 4.658 4.599 4.54 4.482 4.424 4.367 4.31 4.254 4.199 4.144 4.09 4.036 3.983 3.931 3.879 3.827 3.776 3.726 3.677 3.627 3.579 3.531 3.484 3.437 3.391 3.345 3.3 3.255 3.211 3.167 3.124 3.082 3.04 2.998 2.957 2.917 2.877 2.838 2.799 2.76 2.722 2.685 2.648 2.611

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.191" PeakHeight="110.0" Num="3" Error="0.0">
-30.35 12.93 -3.066
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.191" EndFrequency="9.2" PeakHeight="391.147" Num="5" zHalfNm="238.488" Error="7.055">
-254.982 -32.117 19.225 -10.301 4.178
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.15" Depth="0.122"/>
<TopsideChapman PeakHeight="391.147" PeakDensity="1050124.1" PeakScaleHeight="109.097" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
