<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 22:00:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.01.27 (027) 22:00:00</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">
FF202602701272200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.490" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.039" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" Name="h`F2" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="547.377" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.416" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="450.265" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="388.306" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.007" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="92.023" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.112" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.924" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.370" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="127">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 375.000 375.000 375.000 375.000 375.000 370.000 372.500 375.000 375.000 377.500 380.000 375.000 380.000 385.000 385.000 385.000 385.000 385.000 386.500 388.000 389.500 391.000 392.500 394.000 395.500 397.000 398.500 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.556 406.111 406.667 407.222 407.778 408.333 408.889 409.444 410.000 412.500 415.000 420.000 425.000 426.250 427.500 428.750 430.000 430.000 430.714 431.429 432.143 432.857 433.571 434.286 435.000 436.667 438.333 440.000 442.500 445.000 447.500 450.000 445.000 447.500 450.000 452.500 455.000 455.000 455.000 455.000 455.000 460.000 461.500 463.000 464.500 466.000 467.500 469.000 470.500 472.000 473.500 475.000 475.000 477.500 480.000 480.000 485.000 485.000 485.000 490.000 490.000 490.714 491.429 492.143 492.857 493.571 494.286 495.000 495.000 499.167 503.333 507.500 511.667 513.045 514.591 516.338 518.329 520.617 523.275 526.400 530.128 534.651 540.254 547.377 556.735 569.575 588.285 618.084
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 0 0 0 60 57 0 63 63 0 0 57 0 60 63 0 66 66 0 0 0 0 0 0 0 0 0 57 63 66 0 0 69 60 0 0 66 0 0 72 0 0 63 0 0 69 0 60 0 51 0 0 0 54 60 0 0 0 0 63 0 69 0 0 66 51 57 0 51 0 0 0 0 57 60 63 0 0 60 0 0 0 0 0 0 0 0 0 57 57 0 57 60 57 60 60 57 60 0 0 0 0 0 0 63 75 66 63 66 57 0 63 66 60 69 69 63 66 0 48 0 0 0 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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 1.953125 -0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 1.953125 2.734375 -1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.459 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.089 140.0 145.0 150.0 155.0 160.0 165.0 168.179 170.0 175.0 180.0 185.0 190.0 195.0 197.268 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 450.265 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.275 0.36 0.403 0.416 0.411 0.397 0.371 0.332 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.251 0.288 0.325 0.362 0.399 0.416 0.452 0.518 0.585 0.652 0.721 0.793 0.867 0.943 1.023 1.106 1.192 1.282 1.376 1.474 1.576 1.683 1.795 1.912 2.035 2.164 2.298 2.439 2.587 2.742 2.904 3.074 3.253 3.439 3.634 3.838 4.052 4.274 4.506 4.747 4.996 5.255 5.52 5.792 6.069 6.349 6.629 6.906 7.175 7.433 7.674 7.892 8.081 8.236 8.352 8.424 8.45 8.45 8.442 8.416 8.374 8.317 8.246 8.163 8.069 7.965 7.851 7.73 7.602 7.469 7.33 7.187 7.04 6.891 6.74 6.588 6.435 6.281 6.127 5.974 5.822 5.671 5.521 5.373 5.227 5.083 4.941 4.801 4.665 4.53 4.399 4.27 4.144 4.021 3.901 3.783 3.669 3.557 3.449 3.343 3.24 3.139 3.042 2.947 2.855 2.765 2.678 2.594 2.512 2.432 2.355 2.28 2.207 2.136 2.068 2.002 1.938 1.875 1.815 1.757 1.7 1.645 1.592 1.54 1.491 1.442 1.396 1.35 1.306 1.264 1.223 1.183 1.145 1.107 1.071 1.037 1.003 0.97 0.938 0.908 0.878 0.85 0.822 0.795 0.769 0.744 0.72 0.696 0.673 0.651 0.63 0.61 0.59 0.57 0.552 0.534 0.516 0.499 0.483 0.467 0.452 0.437 0.423 0.409 0.396 0.383 0.37 0.358

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.416" PeakHeight="110.0" Num="3" Error="0.0">
-20.622 3.328 -0.247
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.416" EndFrequency="8.45" PeakHeight="450.265" Num="5" zHalfNm="388.306" Error="2.402">
-221.805 -46.077 13.717 1.588 -0.42
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.268" Depth="0.216"/>
<TopsideChapman PeakHeight="450.265" PeakDensity="885887.1" PeakScaleHeight="46.924" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
