<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 17:00:00.000"
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" >
2026.01.30 (030) 17:00:00</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">
FF202603001301700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.665" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.115" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.950" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" Name="h`Es" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="456.908" 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="3.243" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.292" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="326.605" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="219.390" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.990" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="133.648" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.646" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.298" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="180.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="56">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 372.500 375.000 375.000 380.000 380.000 380.000 380.000 382.500 385.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 453.288 456.908 460.911 465.363 470.343 475.952 482.316 489.598 498.015 507.851 519.500 533.515 550.696 572.253
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 48 51 0 54 57 60 63 63 0 60 57 57 0 54 45 0 54 57 0 0 51 48 57 54 60 57 60 51 60 51 60 54 63 57 60 54 45 54 51 48 45 54 45 48 51 51 48 0 0 0 0 0 0 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 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 -2.734375 1.171875 -0.390625 1.171875 1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="51">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 105.000 110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 110.000 110.000 110.000 109.444 108.889 108.333 107.778 107.222 106.667 106.111 105.556 105.000 105.000 105.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 45 0 0 51 0 0 0 0 0 0 51 0 51 54 66 66 0 0 63 63 0 0 0 60 60 0 0 57 0 0 0 0 0 66 0 0 63 66 0 63 0 0 0 0 0 0 0 0 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -2.734375 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
</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" >
89.506 90.0 95.0 100.0 105.0 110.0 112.161 114.321 115.0 116.482 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 326.605 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.181 2.807 3.137 3.243 3.121 3.121 3.159 3.243 3.359 3.529 3.701 3.874 4.044 4.21 4.373 4.532 4.687 4.84 4.99 5.138 5.284 5.428 5.571 5.713 5.855 5.995 6.136 6.276 6.416 6.557 6.697 6.839 6.98 7.122 7.265 7.408 7.551 7.695 7.839 7.983 8.126 8.267 8.405 8.539 8.665 8.781 8.883 8.965 9.022 9.048 9.05 9.048 9.04 9.024 9.001 8.972 8.937 8.896 8.85 8.799 8.742 8.682 8.617 8.548 8.475 8.399 8.32 8.237 8.153 8.065 7.976 7.885 7.792 7.697 7.601 7.504 7.406 7.306 7.207 7.106 7.006 6.905 6.803 6.702 6.601 6.5 6.399 6.298 6.198 6.099 6.0 5.902 5.804 5.707 5.611 5.516 5.421 5.328 5.235 5.144 5.053 4.964 4.875 4.788 4.702 4.617 4.533 4.45 4.369 4.288 4.209 4.131 4.054 3.978 3.903 3.83 3.758 3.686 3.616 3.548 3.48 3.413 3.348 3.283 3.22 3.158 3.097 3.037 2.978 2.92 2.863 2.807 2.752 2.698 2.646 2.594 2.543 2.493 2.443 2.395 2.348 2.302 2.256 2.211 2.167 2.124 2.082 2.041 2.0 1.96 1.921 1.883 1.845 1.809 1.772 1.737 1.702 1.668 1.635 1.602 1.57 1.538 1.508 1.477 1.448 1.419 1.39 1.362 1.335 1.308 1.282 1.256 1.231 1.206 1.182 1.158 1.134 1.112 1.089 1.067 1.046 1.025 1.004 0.984 0.964 0.944

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.243" PeakHeight="110.0" Num="3" Error="0.0">
-30.391 12.99 -3.093
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.243" EndFrequency="9.05" PeakHeight="326.605" Num="5" zHalfNm="219.39" Error="2.454">
-182.123 -43.401 18.213 -2.358 -0.454
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.482" Depth="0.122"/>
<TopsideChapman PeakHeight="326.605" PeakDensity="1016160.06" PeakScaleHeight="76.298" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
