<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 15:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.01.30 (030) 15:40:00</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">
FF202603001301540009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="10.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.291" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.364" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="7.950" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.400" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.460" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="108.369" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="605.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.362" 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="4.347" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="393.550" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="258.272" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.469" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.200" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="167.090" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.974" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.948" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="232.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.150" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="6.300" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="79">
<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 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 10.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 380.000 385.000 385.000 385.000 386.667 388.333 390.000 390.000 390.000 392.500 395.000 397.500 400.000 405.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 545.000 550.000 550.000 555.000 560.000 565.000 570.000 575.000 575.000 580.000 585.000 585.000 590.000 595.000 600.000 605.000 605.000 615.000 620.000 625.837 632.448 640.000 648.708 658.860 670.848
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 60 54 0 57 0 0 57 57 54 0 48 0 60 51 57 60 57 63 57 48 60 51 60 60 60 54 60 57 57 60 57 57 54 57 57 57 54 54 54 54 54 54 54 54 54 54 54 54 57 57 57 54 54 54 54 51 57 57 54 48 57 57 51 54 51 51 51 54 57 60 60 60 57 60 57 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 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="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.4 3.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
108.369 110.644
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="76">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 107.500 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 110.143 110.286 110.429 110.571 110.714 110.857 111.000 111.143 111.286 111.429 111.571 111.714 111.857 112.000 112.143 112.286 112.429 112.571 112.714 112.857 113.000 113.143 113.286 113.429 113.571 113.714 113.857 114.000 114.143 114.286 114.429 114.571 114.714 114.857 115.000 110.000 110.000 110.000 115.000 115.000 115.000 120.000 117.500 115.000 115.000 115.000 115.000 115.000 120.000 120.000 115.000 117.000 119.000 121.000 123.000 125.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 57 57 51 0 0 60 60 57 57 57 54 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 45 0 0 0 0 45 57 45 45 48 45 45 51 0 45 0 48 51 48 45 54 45 0 0 45 0 45 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 1.953125 -0.390625 0.390625 -0.390625 0.390625 -1.953125 1.171875 1.953125 -0.390625 2.734375 1.953125 -0.390625 -1.953125 0.390625 1.953125 -0.390625 -0.390625 1.171875 -1.171875 2.734375 1.953125 0.390625 1.171875 0.390625 1.953125 1.171875 0.390625 0.390625 0.390625 -1.171875 -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 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" >
89.473 90.0 95.0 100.0 105.0 110.0 111.668 113.337 115.0 115.005 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.55 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.328 2.994 3.347 3.46 3.334 3.334 3.46 3.46 3.633 3.785 3.927 4.062 4.194 4.325 4.454 4.582 4.711 4.84 4.969 5.098 5.227 5.356 5.486 5.615 5.745 5.874 6.002 6.13 6.258 6.385 6.511 6.637 6.762 6.886 7.01 7.132 7.255 7.376 7.497 7.617 7.737 7.857 7.976 8.095 8.213 8.331 8.45 8.568 8.686 8.804 8.922 9.041 9.16 9.278 9.397 9.515 9.633 9.749 9.861 9.968 10.064 10.141 10.189 10.2 10.2 10.195 10.186 10.171 10.151 10.126 10.096 10.062 10.024 9.982 9.936 9.886 9.833 9.777 9.717 9.654 9.589 9.521 9.451 9.378 9.303 9.226 9.147 9.067 8.985 8.901 8.816 8.73 8.643 8.555 8.466 8.376 8.286 8.195 8.103 8.011 7.919 7.827 7.734 7.642 7.549 7.456 7.364 7.271 7.179 7.087 6.996 6.904 6.814 6.723 6.633 6.544 6.455 6.367 6.28 6.193 6.106 6.021 5.936 5.852 5.768 5.686 5.604 5.523 5.442 5.363 5.284 5.207 5.13 5.054 4.978 4.904 4.83 4.758 4.686 4.615 4.545 4.476 4.408 4.34 4.274 4.208 4.143 4.079 4.016 3.953 3.892 3.831 3.771 3.713 3.654 3.597 3.54 3.485 3.43 3.376 3.322 3.27 3.218 3.167 3.116 3.067 3.018 2.97 2.922 2.875 2.829 2.784 2.739 2.695 2.652 2.609 2.567 2.526 2.485 2.445 2.406 2.367 2.329 2.291 2.254 2.217

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.46" PeakHeight="110.0" Num="3" Error="0.0">
-30.548 13.223 -3.202
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.46" EndFrequency="10.2" PeakHeight="393.55" Num="5" zHalfNm="258.272" Error="4.949">
-232.26 -73.208 33.496 -9.371 2.798
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.005" Depth="0.126"/>
<TopsideChapman PeakHeight="393.55" PeakDensity="1290818.9" PeakScaleHeight="93.948" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
