<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 14:40:00.000"
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 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" >
2026.01.29 (029) 14:40:00</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">
FF202602901291440009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.344" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.789" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" 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="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="108.369" Name="h`E" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="570.000" 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="3.360" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.346" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="384.803" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.265" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.147" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="151.836" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.022" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.072" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="224.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 200.000 200.000 204.286 208.571 212.857 217.143 221.429 225.714 230.000 225.000 233.750 242.500 251.250 260.000 268.750 277.500 286.250 295.000 295.000 305.000 305.000 310.000 315.000 320.000 325.000 330.000 335.000 340.000 350.000 355.000 355.000 359.375 363.750 368.125 372.500 376.875 381.250 385.625 390.000 392.500 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 440.000 441.667 443.333 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 505.000 510.000 515.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 545.000 550.000 550.000 555.000 555.000 560.000 560.000 565.000 570.000 570.000 580.000 585.000 585.000 590.000 595.000 600.000 605.000 611.358 618.689 627.232 637.318
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 45 0 0 0 0 0 0 48 57 0 51 0 0 0 0 0 51 45 51 48 0 48 0 54 60 63 63 51 45 51 0 0 0 0 0 0 0 45 0 48 45 54 51 54 54 57 57 54 57 51 57 54 57 57 51 54 45 51 54 45 0 0 54 57 60 60 57 48 54 48 57 57 57 63 63 60 63 63 60 60 63 60 60 60 60 60 57 57 60 57 57 57 57 54 54 54 54 54 54 51 54 51 51 48 51 51 51 51 51 48 45 48 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 1.953125 2.734375 0.390625 0.390625 -0.390625 0.390625 -2.734375 1.953125 -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 -1.171875 -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 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 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -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>
<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" >
51 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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" >
89.473 90.0 95.0 100.0 105.0 110.0 111.675 113.35 115.0 115.025 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.803 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.328 2.994 3.347 3.46 3.334 3.334 3.458 3.46 3.574 3.7 3.837 3.983 4.134 4.287 4.44 4.59 4.737 4.881 5.021 5.157 5.289 5.419 5.547 5.672 5.794 5.916 6.035 6.154 6.271 6.388 6.504 6.619 6.734 6.849 6.964 7.079 7.194 7.31 7.426 7.542 7.66 7.778 7.897 8.018 8.139 8.262 8.386 8.512 8.64 8.769 8.9 9.033 9.168 9.304 9.441 9.577 9.712 9.842 9.96 10.06 10.127 10.15 10.15 10.147 10.137 10.121 10.099 10.072 10.04 10.002 9.959 9.912 9.861 9.805 9.746 9.683 9.616 9.546 9.473 9.398 9.319 9.238 9.155 9.07 8.983 8.894 8.803 8.711 8.618 8.523 8.428 8.331 8.234 8.136 8.038 7.939 7.84 7.741 7.641 7.542 7.442 7.343 7.244 7.145 7.046 6.948 6.85 6.753 6.656 6.56 6.464 6.369 6.275 6.181 6.088 5.996 5.905 5.815 5.726 5.637 5.549 5.463 5.377 5.292 5.208 5.125 5.043 4.962 4.883 4.804 4.726 4.649 4.573 4.498 4.424 4.351 4.279 4.208 4.138 4.069 4.002 3.935 3.869 3.804 3.74 3.676 3.614 3.553 3.493 3.433 3.375 3.317 3.261 3.205 3.15 3.096 3.043 2.991 2.939 2.889 2.839 2.79 2.741 2.694 2.647 2.601 2.556 2.512 2.468 2.425 2.383 2.341 2.301 2.261 2.221 2.182 2.144 2.107 2.07 2.033 1.998 1.963 1.928 1.894 1.861 1.829

</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="10.15" PeakHeight="384.803" Num="5" zHalfNm="259.265" Error="8.702">
-218.638 -77.488 33.493 -5.613 -1.532
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.025" Depth="0.126"/>
<TopsideChapman PeakHeight="384.803" PeakDensity="1278194.8" PeakScaleHeight="87.072" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
