<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 18:10:00.000"
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: 70% PACIFIC flags: F2 cusps do not match</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" >
2026.03.27 (086) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603271810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="31" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.582" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.344" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.650" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.860" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="108.742" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="128.393" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.003" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.175" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="364.344" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.534" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.438" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.900" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="110.880" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.665" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.648" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="152.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 253.750 257.500 261.250 265.000 265.000 270.000 270.000 275.000 275.000 275.000 280.000 285.000 290.000 290.000 295.000 296.667 298.333 300.000 302.500 305.000 310.000 310.000 315.000 320.000 320.000 320.000 325.000 326.000 327.000 328.000 329.000 330.000 330.000 332.500 335.000 335.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 356.667 358.333 360.000 361.667 363.333 365.000 366.667 368.333 370.000 370.000 370.000 375.000 370.000 373.333 376.667 380.000 380.000 380.000 385.000 390.000 385.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 422.500 425.000 425.000 426.250 427.500 428.750 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 445.000 447.500 450.000 455.000 455.000 455.000 455.000 457.500 460.000 462.500 465.000 466.250 467.500 468.750 470.000 475.000 478.333 481.667 485.000 485.000 488.333 491.667 495.000 495.000 499.167 503.333 507.500 511.667 515.833 520.000 525.000 530.000 535.960 542.541 549.843
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 45 0 48 54 54 54 57 54 45 0 60 57 63 60 0 0 60 0 60 60 60 60 54 60 63 63 0 63 0 0 63 57 0 60 54 66 60 63 63 63 63 63 63 60 0 0 0 0 0 0 0 0 0 63 63 60 60 48 54 0 60 63 60 0 54 66 48 60 66 72 66 69 75 75 72 63 69 72 63 72 75 66 72 75 75 0 75 78 0 0 0 72 72 63 57 66 63 60 66 51 45 63 60 0 60 0 57 54 48 0 57 54 54 57 54 0 51 0 48 0 0 0 51 48 0 0 42 45 0 0 45 45 0 0 0 0 0 45 45 45 45 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -2.734375 -1.953125 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 0.390625 -0.390625 0.390625 0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.8 2.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
108.742 111.428 114.804
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="16">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
116.786 118.571 120.357 122.143 123.929 125.714 127.500 129.286 131.071 132.857 134.643 136.429 138.214 140.000 135.000 135.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 48 51 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 -1.953125 1.171875 0.390625 -0.390625 2.734375 -2.734375 -1.953125 2.734375 -2.734375 1.171875 -1.953125 -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" >
89.57 90.0 95.0 100.0 105.0 110.0 113.205 115.0 116.41 119.615 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.344 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.922 2.476 2.767 2.86 2.744 2.744 2.744 2.86 2.871 3.014 3.157 3.3 3.444 3.589 3.736 3.884 4.034 4.187 4.341 4.497 4.656 4.816 4.979 5.144 5.311 5.481 5.652 5.826 6.001 6.179 6.359 6.541 6.726 6.913 7.101 7.293 7.486 7.682 7.881 8.082 8.287 8.494 8.703 8.916 9.133 9.352 9.575 9.802 10.031 10.264 10.499 10.735 10.97 11.198 11.41 11.59 11.713 11.75 11.75 11.74 11.716 11.678 11.627 11.563 11.488 11.403 11.308 11.204 11.092 10.972 10.845 10.712 10.574 10.431 10.283 10.132 9.977 9.82 9.66 9.499 9.336 9.171 9.007 8.841 8.676 8.511 8.346 8.182 8.018 7.856 7.695 7.535 7.377 7.221 7.066 6.913 6.762 6.614 6.467 6.323 6.18 6.04 5.903 5.768 5.635 5.504 5.376 5.25 5.127 5.006 4.888 4.771 4.658 4.546 4.437 4.33 4.226 4.123 4.023 3.925 3.83 3.736 3.645 3.555 3.468 3.382 3.299 3.218 3.138 3.06 2.984 2.91 2.838 2.767 2.698 2.631 2.565 2.501 2.438 2.377 2.318 2.26 2.203 2.148 2.094 2.041 1.99 1.94 1.891 1.843 1.797 1.751 1.707 1.664 1.622 1.581 1.541 1.502 1.464 1.427 1.391 1.356 1.321 1.288 1.255 1.224 1.193 1.162 1.133 1.104 1.076 1.049 1.022 0.996 0.971 0.946 0.922 0.899 0.876 0.854 0.832 0.811 0.791 0.77 0.751 0.732

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.86" PeakHeight="110.0" Num="3" Error="0.0">
-30.075 12.526 -2.881
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.86" EndFrequency="11.75" PeakHeight="364.344" Num="5" zHalfNm="280.534" Error="2.227">
-190.879 -72.698 22.289 -4.241 0.8
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.615" Depth="0.116"/>
<TopsideChapman PeakHeight="364.344" PeakDensity="1712934.2" PeakScaleHeight="60.648" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
