<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 12:40:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.02.06 (037) 12:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603702061240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.410" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.169" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.650" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.260" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" 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="103.498" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.849" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.586" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="420.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.134" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.239" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="404.694" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.386" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.067" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="239.583" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.327" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="130.065" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="266.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="102">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.15 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 215.000 215.000 215.000 215.000 215.000 218.000 221.000 224.000 227.000 230.000 235.000 242.000 249.000 256.000 263.000 270.000 275.000 278.750 282.500 286.250 290.000 293.750 297.500 301.250 305.000 310.000 310.000 315.000 317.500 320.000 320.000 325.000 327.727 330.455 333.182 335.909 338.636 342.403 346.169 349.935 353.701 357.468 361.234 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 415.000 420.000 420.000 430.000 430.000 440.000 440.000 445.000 450.000 460.000 465.000 470.000 480.000 485.000 495.000 500.000 510.000 520.000 530.000 540.000 550.000 560.000 565.000 575.000 585.000 595.000 605.000 615.000 625.000 640.000 654.823 671.053 688.899 708.615 730.512 754.972 782.475 813.624 849.196
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 48 48 48 45 0 0 0 0 54 48 0 45 0 0 51 48 0 45 0 0 0 0 0 54 51 0 0 0 60 57 57 0 54 0 0 51 0 0 0 0 0 0 45 54 45 57 48 57 0 45 57 57 63 54 51 45 48 57 51 48 57 63 66 60 60 66 60 60 57 63 63 63 66 66 72 69 66 66 63 60 54 54 54 54 57 57 57 57 57 57 57 57 57 54 54 51 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -1.171875 -2.734375 0.390625 0.390625 -0.390625 1.953125 1.953125 -1.953125 -0.390625 0.390625 0.390625 -2.734375 -0.390625 0.390625 -2.734375 0.390625 0.390625 -1.171875 -0.390625 -0.390625 0.390625 -1.171875 1.171875 -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 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 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="13">
<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 3.1 3.15 3.2 3.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
103.498 103.990 104.519 105.090 105.710 106.388 107.138 107.977 108.931 110.039 111.367 113.037 115.323
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 54 54 0 0 0 0 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 -0.390625 -0.390625 1.171875 -1.171875 1.171875 1.953125 -1.171875
</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 95.0 100.0 100.849 103.478 105.0 106.108 108.737 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 404.694 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.718 3.249 3.26 3.133 3.133 3.133 3.26 3.296 3.433 3.563 3.692 3.821 3.952 4.085 4.223 4.363 4.508 4.656 4.806 4.958 5.111 5.264 5.416 5.565 5.712 5.856 5.996 6.133 6.266 6.395 6.521 6.643 6.762 6.877 6.99 7.1 7.207 7.312 7.414 7.514 7.612 7.707 7.8 7.892 7.981 8.068 8.154 8.237 8.318 8.397 8.474 8.548 8.62 8.69 8.756 8.82 8.879 8.935 8.987 9.035 9.077 9.114 9.144 9.169 9.186 9.197 9.2 9.2 9.199 9.194 9.188 9.179 9.167 9.154 9.138 9.119 9.099 9.077 9.052 9.026 8.998 8.968 8.936 8.903 8.867 8.831 8.793 8.753 8.712 8.67 8.627 8.582 8.536 8.489 8.441 8.392 8.342 8.292 8.24 8.188 8.134 8.08 8.026 7.971 7.915 7.859 7.802 7.744 7.687 7.629 7.57 7.511 7.452 7.393 7.333 7.274 7.214 7.154 7.094 7.033 6.973 6.913 6.852 6.792 6.731 6.671 6.611 6.551 6.491 6.431 6.371 6.311 6.252 6.193 6.133 6.075 6.016 5.958 5.899 5.842 5.784 5.727 5.67 5.613 5.556 5.5 5.445 5.389 5.334 5.279 5.225 5.171 5.117 5.064 5.011 4.958 4.906 4.854 4.803 4.752 4.701 4.651 4.601 4.552 4.503 4.454 4.406 4.358 4.31 4.263 4.217 4.171 4.125 4.079 4.034 3.99 3.946 3.902 3.859 3.816 3.773 3.731 3.689 3.648 3.607 3.567 3.526

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.26" PeakHeight="100.849" Num="3" Error="2.855">
-16.093 6.886 -1.642
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.26" EndFrequency="9.2" PeakHeight="404.694" Num="5" zHalfNm="224.386" Error="10.71">
-294.959 -10.332 16.142 -10.071 3.263
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.888" Depth="0.127"/>
<TopsideChapman PeakHeight="404.694" PeakDensity="1050124.1" PeakScaleHeight="130.065" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
