<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 19:40:00.000"
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" >
2026.01.29 (029) 19:40:00</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">
FF202602901291940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.389" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.845" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.250" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.560" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="104.987" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.200" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.013" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" 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="2.479" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="393.220" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.811" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.126" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="161.986" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.052" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="86.200" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="182.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.35 3.4 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 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 10.2 10.25 10.3 10.35 10.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 241.667 243.333 245.000 245.000 245.000 250.000 255.000 256.667 258.333 260.000 260.000 260.000 260.000 270.000 270.000 270.000 270.000 280.000 280.000 282.500 285.000 285.000 290.000 292.500 295.000 296.875 298.750 300.625 302.500 304.375 306.250 308.125 310.000 313.333 316.667 320.000 320.000 320.000 320.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 342.000 344.000 346.000 348.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 460.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 580.000 585.000 595.000 605.000 615.000 627.717 642.377 659.465 679.636
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 57 0 0 57 54 54 48 0 0 0 45 54 54 48 57 60 0 57 54 60 0 57 57 51 0 51 0 0 54 0 0 0 0 0 0 0 48 60 63 66 60 51 0 57 63 57 0 0 66 63 63 66 66 0 45 0 0 66 69 57 0 66 69 66 66 51 60 66 69 60 63 66 60 66 66 63 63 57 63 63 60 66 63 69 66 66 57 66 69 66 66 66 63 66 66 66 69 69 66 66 66 63 63 63 66 66 66 63 66 66 66 63 66 63 63 60 63 63 60 60 63 60 60 57 0 54 0 57 57 57 57 54 54 54 51 51 0 45 45 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 2.734375 -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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.25 2.3 2.35 2.4 2.45 2.5 2.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
104.987 106.137 107.424 108.888 110.589 112.626 115.184
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 0 0 0 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.171875 -0.390625 -2.734375 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" >
90.0 95.0 100.0 100.2 105.0 105.889 110.0 111.578 115.0 117.267 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.22 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.188 2.559 2.56 2.469 2.431 2.431 2.431 2.509 2.56 2.624 2.736 2.842 2.947 3.053 3.16 3.269 3.381 3.498 3.62 3.747 3.88 4.021 4.168 4.323 4.485 4.655 4.832 5.015 5.202 5.393 5.586 5.78 5.973 6.165 6.355 6.542 6.725 6.906 7.083 7.257 7.428 7.596 7.761 7.924 8.084 8.241 8.396 8.548 8.699 8.847 8.993 9.137 9.278 9.417 9.552 9.683 9.81 9.931 10.044 10.147 10.237 10.311 10.365 10.394 10.4 10.4 10.394 10.382 10.363 10.339 10.308 10.273 10.232 10.186 10.135 10.08 10.021 9.958 9.891 9.82 9.746 9.67 9.59 9.507 9.422 9.335 9.246 9.155 9.062 8.967 8.871 8.774 8.675 8.576 8.476 8.375 8.273 8.171 8.069 7.966 7.863 7.76 7.657 7.554 7.451 7.349 7.247 7.145 7.043 6.942 6.842 6.742 6.643 6.545 6.447 6.35 6.254 6.159 6.064 5.971 5.878 5.786 5.695 5.605 5.517 5.429 5.342 5.256 5.171 5.087 5.005 4.923 4.842 4.763 4.684 4.607 4.53 4.455 4.38 4.307 4.235 4.163 4.093 4.024 3.956 3.889 3.823 3.757 3.693 3.63 3.568 3.507 3.446 3.387 3.328 3.271 3.214 3.159 3.104 3.05 2.997 2.945 2.893 2.843 2.793 2.744 2.696 2.649 2.603 2.557 2.512 2.468 2.424 2.382 2.34 2.299 2.258 2.218 2.179 2.14 2.103 2.065 2.029 1.993 1.958 1.923 1.889

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.56" PeakHeight="100.2" Num="3" Error="2.717">
-14.909 6.059 -1.35
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.56" EndFrequency="10.4" PeakHeight="393.22" Num="5" zHalfNm="272.811" Error="6.8">
-241.99 -43.666 16.498 -11.649 4.854
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.067" Depth="0.129"/>
<TopsideChapman PeakHeight="393.22" PeakDensity="1341935.5" PeakScaleHeight="86.2" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
