<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 16:20:00.000"
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) 16:20:00</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">
FF202603001301620009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.254" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.893" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="7.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" 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="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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" 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="3.320" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.327" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="428.359" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.628" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.721" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.950" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="216.127" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="70.453" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="118.690" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="249.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="6.600" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="81">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.45 10.5 10.55 10.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 392.500 395.000 395.000 396.667 398.333 400.000 405.000 406.667 408.333 410.000 410.000 415.000 415.000 420.000 420.000 425.000 427.500 430.000 432.500 435.000 437.500 440.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 525.000 535.000 535.000 540.000 550.000 550.000 555.000 560.000 565.000 570.000 575.000 580.000 585.000 595.000 600.000 605.000 615.000 623.619 632.979 643.181 654.343 666.608 680.147 695.170 711.935 730.763 752.061 776.348 804.303 836.821
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 48 51 51 45 48 48 0 51 48 0 0 45 48 0 0 57 60 60 60 57 60 57 0 54 0 0 0 54 51 54 0 54 57 60 57 0 48 0 45 54 51 51 54 57 60 63 63 63 60 54 54 51 54 51 54 54 57 60 60 60 57 63 66 66 69 69 69 66 60 60 54 54 54 54 54 54 51 0 42
</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 -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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="80">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 107.500 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 107.500 110.000 110.000 110.000 110.000 115.000 114.286 113.571 112.857 112.143 111.429 110.714 110.000 109.286 108.571 107.857 107.143 106.429 105.714 105.000 110.000 110.000 108.333 106.667 105.000 105.000 105.000 110.000 110.000 110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 51 0 57 60 0 57 51 60 0 57 0 0 60 63 0 0 60 57 0 63 0 0 57 0 0 0 0 0 0 0 0 66 72 0 69 0 72 0 66 0 66 57 45 45 0 45 0 0 0 45 0 0 0 0 0 0 63 51 51 0 0 60 60 57 48 48 48 54 54 57 57 54 54 54 54 60 0 51
</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 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
</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" >
89.494 90.0 95.0 100.0 105.0 110.0 111.84 113.681 115.0 115.521 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 428.359 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.233 2.873 3.212 3.32 3.197 3.197 3.285 3.32 3.446 3.582 3.716 3.848 3.98 4.113 4.246 4.38 4.516 4.653 4.791 4.93 5.071 5.212 5.354 5.498 5.641 5.785 5.929 6.073 6.216 6.36 6.502 6.644 6.786 6.926 7.066 7.204 7.342 7.478 7.614 7.748 7.88 8.012 8.142 8.271 8.399 8.525 8.649 8.772 8.894 9.013 9.131 9.246 9.36 9.471 9.579 9.685 9.787 9.886 9.98 10.071 10.156 10.236 10.31 10.377 10.436 10.487 10.53 10.562 10.585 10.598 10.6 10.6 10.597 10.59 10.58 10.567 10.55 10.531 10.508 10.482 10.453 10.422 10.388 10.352 10.313 10.271 10.228 10.182 10.134 10.084 10.032 9.979 9.924 9.867 9.808 9.748 9.687 9.624 9.56 9.495 9.429 9.361 9.293 9.224 9.154 9.083 9.012 8.94 8.867 8.794 8.72 8.645 8.571 8.496 8.421 8.345 8.269 8.193 8.117 8.041 7.965 7.889 7.812 7.736 7.66 7.584 7.508 7.432 7.357 7.282 7.206 7.132 7.057 6.983 6.909 6.835 6.762 6.689 6.617 6.544 6.473 6.401 6.331 6.26 6.19 6.121 6.052 5.984 5.916 5.848 5.781 5.715 5.649 5.584 5.519 5.454 5.391 5.327 5.265 5.203 5.141 5.08 5.02 4.96 4.901 4.842 4.784 4.726 4.669 4.613 4.557 4.502 4.447 4.393 4.339 4.286 4.233 4.182 4.13 4.079 4.029 3.979 3.93 3.881 3.833 3.785

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.32" PeakHeight="110.0" Num="3" Error="0.0">
-30.45 13.076 -3.132
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.32" EndFrequency="10.6" PeakHeight="428.359" Num="5" zHalfNm="265.628" Error="4.394">
-294.241 -30.915 16.035 -5.356 1.639
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.521" Depth="0.123"/>
<TopsideChapman PeakHeight="428.359" PeakDensity="1394044.6" PeakScaleHeight="118.69" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
